Vocabulary

How the vocabularies relate

No single discipline owns these bodies. Somaesthetics provides the method stance: embodied experience is primary, so boundary terms matter when they reorganize perception, action, and felt bodily meaning. Media theory then names staged transitions and image genealogies; XR work names rendering modes and interaction grammars; perception research explains how coherence survives soft boundaries; and pain translation asks what boundary change does when body representation already matters clinically (Shusterman; Hook et al.; Eisenstein; dos Anjos and Pereira; Wagemans et al.; Bullington).

The point of this page is not to flatten those differences. It is to show how the terms cluster, where they come from, and which one best explains what the body is doing: staying coherent, changing boundary, entering relation, or becoming experimentally useful.

Core umbrella terms

Somaesthetics

A pragmatic discipline that treats the lived body as the medium of perception, action, and self-presentation. On this site it names the method anchor: boundary design matters because it reshapes embodied experience rather than merely changing the body's image.

Best used when the emphasis is on felt bodily experience, somatic awareness, and design from within rather than appearance alone (Shusterman; Hook et al.).

Weakly bounded body

A body whose edge is soft, distributed, permeable, or unstable while remaining readable as a body. This is the broadest public-facing phrase on the site because it names the central problem without locking the body to one historical register.

Best used when the emphasis is on boundary condition and felt self-boundary rather than rendering style (Shusterman; Wagemans et al.; Johansson; Glowacki).

Semi-corporeal avatar

The site's main umbrella term for avatars that are present enough for embodiment and relation without being fully solid, sealed, or anatomically closed. It covers spectral, aura-like, point-cloud, particle, and other partially materialized forms.

Best used for cross-disciplinary discussion when several body types need to stay in scope at once (Richards et al.; dos Anjos and Pereira; Desnoyers-Stewart et al.; Glowacki).

Plasmatic body / plasmatic multitude

The term plasmatic stresses anti-ossified changeability, while plasmatic multitude adds multiplicity, collectivity, and many-part body structure. Together they are useful when transformation and reconfiguration matter more than stable contour.

Best used when the body is both mutable and compositionally multiple (Eisenstein; Geil; Whissel).

Historical and media-theory terms

Spectral body

A body rendered as apparition-like, reduced-material, or ghost-adjacent. The term is useful when the figure remains bodily but clearly departs from ordinary substantial presence.

Strong when the emphasis is on apparition, projection, or immaterial body image (Richards et al.; Owens).

Animated spirit

Bukatman's term for a media poetics where liveliness and spirit imagery meet. It is useful when animation is being discussed as vitality rather than just as a technical effect.

Best for animation-theory discussions of aliveness, motion, and enchantment (Bukatman).

Ghost / apparition

Historical terms for non-solid presence across phantasmagoria, seance, stage illusion, spirit photography, and film. On this site they are kept tied to those source traditions rather than used as a loose synonym for anything atmospheric.

Best when the historical apparatus or cultural register matters explicitly (Owens; Gunning; Natale).

Non-corporeal lifeform

A useful franchise term from Star Trek for beings that persist as energy, cloud, patterned light, or host-dependent presence rather than as a stable corporeal body. It matters here as a mainstream screen index for semi-corporeal bodies rather than as a scientific category.

Best when pointing to popular-media precedents such as the Zetarians, Douwd, Onaya, the Pahvans, Ronin, and the Companion (Memory Alpha; Memory Alpha Zetarian; Memory Alpha Douwd; Memory Alpha Onaya; Memory Alpha Ronin; Memory Alpha Pahvan; Memory Alpha Companion).

Ectoplasm

A historical material metaphor for extruded, mutable, partly formed animated matter. It matters because it names a body that is neither pure spirit nor settled substance, but something in transition.

Best when discussing protrusion, materialization, unstable substance, or occult media history (Wilson).

Thought-form

A theosophical image term for feeling or thought rendered as visible color, shape, vibration, or field. It matters here as a historical vocabulary for non-solid bodies that radiate or condense without hard contour.

Best when the body is being pictured as emanation, aura, or subtle matter (Wilson; Besant and Leadbeater).

Digital multitude

Whissel's term for CG swarms, crowds, and many-part formations that carry narrative and symbolic force. It is the most useful term here when multiplicity becomes the body's main visual logic.

Best when number, collectivity, or swarm-scale meaning is central (Whissel).

XR and avatar-design terms

Weakly representational body

Glowacki's term for bodies that suggest a being without fixing it too tightly. These forms stay bodily, but they leave room for projection, ambiguity, and altered self-other relation.

Best when discussing bodies that are intentionally under-specified rather than fully descriptive (Glowacki).

Numadelic body

Glowacki's category for low-rigidity, boundary-softened body forms that support connectedness, imaginative projection, and altered phenomenology without requiring conventional anatomical depiction.

Best when discussing the Isness line and closely related body designs (Glowacki; Glowacki et al.).

Aura avatar

A field-like or envelope-like body that emphasizes proximity, touch metaphor, interpersonal boundary, or shared atmosphere rather than fully modeled anatomy.

Best when the body functions as a relational field (Desnoyers-Stewart et al.; Glowacki).

Energetic essence / luminous body

Terms used for bodies rendered as light-bearing, radiant, or field-like rather than as opaque skin and surface. They are most helpful when luminosity is the primary carrier of presence.

Best for the Isness cluster and related light-body work (Glowacki et al.; Glowacki).

Point-cloud avatar

A body rendered as sparse points rather than a continuous surface. It is useful when the question is how little surface information is needed for ownership, presence, or recognition to hold.

Best when abstraction is driven by sampling and sparsity (dos Anjos and Pereira; Desnoyers-Stewart).

Particle body

A body built from particles, emission systems, or fuzzy many-part rendering rather than a fixed shell. It is useful when the body needs atmosphere, softness, or reactive transformation at the edge.

Best when materiality is carried by behavior and density rather than by surface closure (Reeves; Desnoyers-Stewart et al. 2020; Bernal and Maes).

Swarm body

A many-agent body whose unity comes from coordinated movement rather than one envelope. It is most helpful when collectivity and motion do more work than silhouette.

Best when bodily identity emerges from distributed behavior (Reynolds; Whissel).

Perception and interaction terms

Gestalt coherence

The grouping logic that lets fragments, sparse points, or soft boundaries still resolve into one figure. It is the main perceptual explanation for why weakly bounded bodies can still feel body-like.

Best when explaining readability without full closure (Wagemans et al.; Johansson).

Common fate

A motion cue in which many elements read as one entity because they move together. It is especially useful for particle, swarm, and point-based bodies.

Best when bodily unity comes from coordinated motion (Wagemans et al.; Reynolds).

Legible transformation

A design rule rather than a single theory term: transformation stays believable when physical, expressive, or relational cues remain readable as the body changes.

Best when stylization needs to stay trustworthy rather than arbitrary (Gilland 2009; Gilland 2012; Bernal and Maes).

Proteus effect

The finding that transformed self-representation can feed back into behavior and self-perception. It is the basic reason avatar form matters as a condition of action rather than just of appearance.

Best when asking how avatar form changes conduct, affect, or social relation (Yee and Bailenson).

Pseudohaptics

Felt touch, stiffness, friction, or resistance induced through vision and cross-modal cueing rather than dedicated haptic hardware. It matters because abstract bodies can still feel materially persuasive.

Best when materiality is inferred through behavior and sensory alignment (Lecuyer; Pusch and Lecuyer; Collins and Kapralos; Desnoyers-Stewart et al.).

Coalescence

A condition in which bodies overlap, merge, or become continuous without dissolving into noise. It is especially useful for shared-body and connectedness work.

Best when the body is relationally mixed rather than strictly individual (Glowacki et al.; Glowacki; Desnoyers-Stewart et al. 2020).

Permeability

The body's capacity to be crossed, shared, buffered, or partially mixed with its surroundings. It is one of the clearest working terms for soft boundaries in both XR and pain-oriented design.

Best when the edge of the body is being treated as a variable rather than a given (Glowacki; Desnoyers-Stewart et al.).

Boundary precision

A parameter describing how sharply a body's edge is specified: hard contour, soft gradient, or distributed field. It is useful because semi-corporeality becomes a controllable variable only when the body's edge can be described and adjusted.

Best when the body is being treated as an experimental condition rather than a fixed shell (Shusterman; Wagemans et al.; Bullington; Ho et al.).

Translation and care terms

Structural specificity

A measure of how concretely a body is specified. Lower specificity leaves more room for projection and ambiguity; higher specificity pushes the body toward fixed identification.

Best when comparing tightly defined avatars to more suggestive body forms (Glowacki).

Symbolic rigidity

A measure of how tightly a form maps onto familiar bodily expectations or social priors. Lower rigidity allows a body to stay legible while remaining open-ended in meaning.

Best when asking how much a form dictates interpretation in advance (Glowacki).

Liminal design

A design approach centered on transitions, invitation, threshold states, and return rather than static depiction alone. It matters here because semi-corporeal bodies often work through staging as much as through appearance.

Best when the body is introduced as a changing mode of being there (Liedgren et al.).

Projection and light apparatus

The staging of bodies through projection, reflection, haze, smoke, beams, screens, and hidden optical setup. This term is useful when weakly bounded bodies move from avatars into installations, theater, or spatial light environments.

Best when apparatus and embodiment need to be discussed together (Gunning; Science Museum Group; Royal Collection Trust; Mitchell et al.).

Transporter dematerialization

A serial screen grammar in which the body phases into light, particulate shimmer, or energy before being reassembled elsewhere. It is useful because it normalizes body-to-field conversion as a repeatable visual event rather than a singular ghost trick.

Best when discussing phased transition between corporeal and semi-corporeal states in popular media (ASC Staff).

Body-world meaning

Bullington's phrase is useful when bodily difficulty is treated as a disturbance in relation, situation, and interpretation rather than only as a local malfunction. It matters for the pain track because altered body form can then become a tool for remapping agency, protection, or threat.

Best when the body is being redesigned as part of a wider meaning loop (Bullington; Ho et al.).

Tactile visualization

Representing felt touch qualities visually so they can be communicated, compared, and tracked over time. It is especially useful when a study wants to capture not only pain intensity but also location, spread, frequency, and texture-like qualities of sensation.

Best when boundary precision or body sensation needs a reportable measurement bridge (Volpato et al.).

Terms to use carefully

Some words are historically rich but analytically slippery. On this site, ghost and spirit are used when the historical source really belongs to ghost culture, occult modernism, animation poetics, or apparition media. They are not used as blanket substitutes for every diffuse or luminous body (Owens; Wilson; Bukatman).

Quantum is avoided unless a real optical, material, or physics bridge is explicitly in view. Otherwise it tends to blur rather than clarify the body-form question.

The simplest rule is to choose the term that best explains what the body is doing: staying legible, changing boundary, entering relation, or changing material register.