Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 170 of 333
- Lewy Body Dementia (LBD, Dementia with Lewy Bodies, DLB)
- A type of progressive dementia caused by abnormal protein deposits called Lewy bodies in the brain. Lewy body dementia affects thinking, movement, behavior, and mood, and is the third most common caus…
- Lexical Access (Lexical Retrieval, Word Access)
- The cognitive process of retrieving words from the mental lexicon during language production or comprehension. Lexical access involves activating the phonological, semantic, and syntactic properties o…
- Lexical Chain (Lexical Chaining, Lexical Cohesion)
- A sequence of semantically related words running through a text — for example, "doctor", "hospital", "nurse", "patient" — connected by relations like synonymy, hypernymy, or hyponymy. Lexical chains c…
- Lexical Elaboration (Vocabulary Elaboration)
- A text adaptation technique that makes content more accessible by adding explanatory information for complex or unfamiliar words, rather than replacing or removing them. Unlike text simplification, wh…
- Lexical NMS (Lexical Non-Manual Sign)
- Non-manual signs that are an integral part of a specific sign's production, required to distinguish it from other signs that share the same manual component. For example, the ASL sign for "NOT YET" in…
- Lexical Semantics
- The branch of linguistics concerned with the meaning of words and the relationships between word meanings, including synonymy, antonymy, and the semantic roles words can fill in sentences. In assistiv…
- Lexical Signing (Lexical Sign, LS)
- In American Sign Language and related signed languages, the production of meaning by syntactically combining individual lexical signs drawn from the language's vocabulary — analogous to combining word…
- Lexical Simplification (Word-Level Simplification)
- A form of text simplification that focuses on replacing complex, uncommon, or technical words with simpler, more familiar alternatives. Lexical simplification is particularly relevant for readers with…
- Lexile Framework (Lexile, Lexile Measure)
- A commercial readability framework developed by MetaMetrics that places both texts and readers on a common scale — the Lexile measure — to support matching readers with materials at an appropriate lev…
- Lexile Score (Lexile Measure, Lexile Level)
- A standardised measure of text complexity and reading ability, expressed on the Lexile scale (roughly 0L to 1600L+). A Lexile text measure reflects sentence length and word frequency; a Lexile reader …
- LiDAR (Light detection and ranging, Laser scanning)
- A remote sensing technology that measures distances by emitting laser pulses and analysing the reflected light, producing precise three-dimensional point clouds of the surrounding environment. In acce…
- Liberatory access (Liberation-oriented access)
- An approach to accessibility that goes beyond inclusion and assimilation to challenge the broader conditions of ableism and exclusion that create inaccessibility in the first place. Coined by disabili…
- Libras (Brazilian Sign Language, Língua Brasileira de Sinais)
- The official sign language of the Deaf community in Brazil, recognized by Brazilian federal law (Law No. 10.436/2002) as a legitimate means of communication and expression. Libras has its own grammar,…
- Librosa
- An open-source Python library for audio and music signal analysis, widely used in music-information retrieval and accessibility research to extract low-level acoustic features such as tempo, RMS energ…
- Life Story Work (Life Story, Biography Work, Digital Biography)
- A person-centered approach to care that involves gathering and sharing information about an individual's life history, preferences, relationships, and experiences. In dementia care, life story work he…
- Lifelogging (Life Logging, Digital Lifelogging)
- Lifelogging is the practice of automatically and continuously capturing data about a person's daily life using sensors, cameras, GPS, and other digital tools, typically worn or carried by the individu…
- Lifestyle Modelling (Lifestyle Monitoring, Lifestyle Modeling)
- Lifestyle modelling is the correlation of a person's observed day-to-day activities — sleeping, eating, moving between rooms, interacting with objects — with inferences about their well-being, usually…
- Light Sensitivity (Photophobia, Photosensitivity)
- An abnormal sensitivity to light that causes discomfort, pain, or visual disruption. Many people with low vision experience light sensitivity, which can be exacerbated by bright overhead lighting, bac…
- Lighthouse (Google Lighthouse, Chrome Lighthouse)
- An open-source automated tool developed by Google for auditing web page quality, including performance, accessibility, SEO, and progressive web app compliance. Lighthouse runs in Chrome DevTools, as a…
- Likert Scale (Likert-Type Scale)
- A psychometric rating scale commonly used in surveys and usability studies where respondents indicate their level of agreement or satisfaction on a symmetric scale, typically with 5 or 7 points rangin…