Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 190 of 333
- Motor control (Motor coordination, Movement control)
- The process by which the nervous system coordinates muscles and limbs to produce purposeful, accurate movement. Motor control involves planning movements, executing them, and using sensory feedback to…
- Motor speech disorder (MSD)
- A category of speech disorders caused by neurological impairments affecting the motor planning, programming, or execution of speech movements. Motor speech disorders include dysarthria (muscle weaknes…
- Mouse (Computer Mouse, Optical Mouse)
- A mouse is a hand-operated pointing device that translates relative motion across a flat surface into movement of an on-screen cursor, with one or more buttons and usually a scroll wheel for selection…
- Mouse Alternative (Alternative Pointing Device, Mouse Replacement)
- A mouse alternative is any input device or technique that lets a user perform pointer-control tasks — moving a cursor, clicking, dragging, selecting — without using a conventional mouse. For people wi…
- Mouse Emulation (Mouse Simulation, Virtual Mouse)
- Software or hardware that simulates mouse pointer movement, clicks, and other mouse actions using alternative input methods such as head tracking, eye gaze, joysticks, switch scanning, keyboard comman…
- Mouse Pointer (Cursor, Screen Pointer, Onscreen Pointer)
- The small graphical indicator on a computer screen that represents the position of a pointing device such as a mouse, trackpad, or stylus. The mouse pointer is used to identify and interact with inter…
- Mouth Interface (Mouth-operated interface, Mouth-based input)
- An input modality that uses mouth movements - tongue position, cheek puffs, jaw motion, lip gestures, breath, or sip-and-puff - to control a computer, wheelchair, or XR system. Mouth interfaces serve …
- Mouth Joystick (Lip Joystick, Mouth-Operated Joystick)
- An assistive input device controlled by the user's mouth, lips, or tongue that functions as a pointer or gamepad joystick. The user moves a small stick held between the lips to direct cursor or on-scr…
- Mouth Morphemes (Mouth Gestures, Mouthing (ASL), Adverbial Mouth Morphemes)
- Non-manual mouth configurations in sign languages that carry grammatical or adverbial meaning independent of the words they accompany. In American Sign Language, mouth morphemes include patterns such …
- Mouthing (Mouth Patterns)
- In sign language, mouthing refers to the mouth movements that accompany manual signs, typically derived from the spoken language of the surrounding hearing community. For example, a signer using Germa…
- Movement Disorder (Motor Disorder)
- A group of neurological conditions that affect the speed, fluency, quality, and ease of movement. Movement disorders can cause excessive or reduced movement that may or may not be voluntary. Common ty…
- Movement Sonification (Motion Sonification)
- The practice of mapping qualities of physical movement - such as speed, direction, duration, or weight - to non-verbal sound cues so that movement can be perceived auditorily. In accessibility context…
- Mu Rhythm (Mu Wave, Mu Oscillation)
- A pattern of electrical brain activity oscillating at approximately 8-12 Hz, recorded over the sensorimotor cortex. Mu rhythms are suppressed (desynchronised) when a person performs or imagines perfor…
- Multi-Factor Authentication (MFA, 2FA, Two-Factor Authentication, Two-Step Verification)
- An authentication pattern that requires two or more verification factors — something you know (password), have (phone, token), or are (biometric) — to confirm a user's identity. MFA substantially redu…
- Multi-Fidelity Modeling (Multi-Fidelity Tactile Materials)
- A design strategy that provides tactile representations at multiple levels of detail and complexity to support layered learning and comprehension. In accessible museum and educational contexts, this m…
- Multi-Grade Classroom (Multi-Grade Teaching, Combined Classroom)
- A classroom setting where a single teacher instructs students from multiple grade levels simultaneously. Multi-grade classrooms are common in schools for the blind in India, where teacher shortages re…
- Multi-Layered Interface (ML Interface, Layered Interface, Training Wheels Interface)
- An interface design approach where novice users start with a reduced-functionality layer containing only basic features, then progress to more complex layers as they become comfortable. This technique…
- Multi-Modal (Multi-Modality, Multimodal Interaction)
- An approach to presenting information or enabling interaction through multiple sensory channels simultaneously, such as combining visual, auditory, and tactile outputs. In accessibility, multi-modal d…
- Multi-Modal Communication (Multimodal Communication)
- Communication that simultaneously uses multiple channels or modes—such as speech, gesture, facial expression, gaze, device output, and body movement—to convey meaning. AAC users are inherently multi-m…
- Multi-Modal LLM (Multimodal Large Language Model, MLLM, Vision-Language Model)
- A large language model that can process and reason over more than one type of input modality, typically text combined with images, audio, or video. In accessibility research, multi-modal LLMs such as …