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Glossary

Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.

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National Technical Institute for the Deaf(also: NTID)
The National Technical Institute for the Deaf (NTID), one of the nine colleges of Rochester Institute of Technology (RIT), is the first and largest technical college in the world for students who are deaf or hard of hearing. Established by U.S. federal legislation in 1965, NTID…
Non-Manual Sign(also: NMS, Non-Manual Marker, Non-Manual Signal)
Facial expressions, head movements, eye gaze, mouth movements, and body posture that serve essential grammatical and linguistic functions in sign languages. In ASL, NMS perform lexical functions (distinguishing between signs like CLEAN and VERY CLEAN), morphological functions…
Non-Manual Signal(also: NMS, Non-Manual Marker, NMM)
A linguistic component of sign languages that is expressed through parts of the body other than the hands, including facial expressions, eyebrow movement, head tilts, shoulder shifts, mouth movements, and eye gaze direction. Non-manual signals serve critical grammatical…
Non-Manual Signals(also: Non-Manual Markers, NMS, NMM)
Linguistic information conveyed through parts of the body other than the hands in sign languages, including facial expressions, mouth movements, eye gaze, head tilts, head shakes, and body shifts. In American Sign Language and other sign languages, non-manual signals serve…
Non-Manual Signs(also: Non-Manual Markers, NMS, NMM)
Components of sign language that are produced without the hands, including facial expressions, mouth movements, eye gaze direction, head tilts, body posture, and shoulder shifts. Non-manual signs are not merely expressive additions but are grammatically essential in sign…

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