Glossary
Searchable terminology from accessibility, web standards, and related fields.
6660 terms — page 104 of 333
- Dynamic HTML (DHTML)
- A collection of technologies — including HTML, CSS, JavaScript, and the Document Object Model (DOM) — used together to create interactive and animated web content that can change after a page has load…
- Dynamic Keyboard (Adaptive Keyboard, Self-Adjusting Keyboard)
- An assistive technology concept in which a keyboard automatically adjusts its input parameters — such as key repeat rate, debounce time, and acceptance delay — based on the user's typing patterns and …
- Dynamic Programming (DP, DP Matching)
- A mathematical optimization technique used in pattern recognition that breaks complex problems into simpler overlapping subproblems. In accessibility technology, dynamic programming matching (DP match…
- Dynamic Tactile Graphics (Interactive Tactile Graphics, Animated Tactile Graphics)
- Tactile representations of visual information that can change, move, or respond to user interaction in real time, as opposed to traditional static tactile graphics which are fixed once produced. Dynam…
- Dynamic Time Warping (DTW)
- An algorithm for measuring similarity between two temporal sequences that may vary in speed or timing. Dynamic time warping aligns sequences by warping the time axis to find the optimal match, making …
- Dynamic Type (Dynamic Text Size, Text Scaling, Font Scaling)
- An iOS accessibility feature that allows users to adjust the system-wide text size to meet their reading needs, from very small to very large. Apps that support Dynamic Type automatically reflow and r…
- Dysarthria (Motor speech disorder, Neuromotor speech impairment)
- A group of speech disorders caused by weakness, paralysis, or lack of coordination in the muscles used for speaking, resulting from damage to the brain or nervous system. Speech may sound slurred, slo…
- Dysarthric Speech (Dysarthria)
- Dysarthric speech is speech that is affected by dysarthria, a motor speech disorder resulting from neurological injury or conditions that affect the muscles used for speech production. Characteristics…
- Dysautonomia
- A group of conditions caused by dysfunction of the autonomic nervous system, which controls involuntary functions like heart rate, blood pressure, digestion, and temperature regulation. Dysautonomia c…
- Dyscalculia (Math Learning Disability, Number Blindness, Mathematics Disorder)
- A specific learning disorder that affects the ability to acquire, understand, and manipulate numerical and mathematical concepts. People with dyscalculia may have difficulty with number sense, memoriz…
- Dysfluency (Disfluency, Speech Dysfluency)
- An interruption in the normal flow of speech, including repetitions of sounds, syllables, or words ("b-b-because"), prolongations of sounds ("ssssnake"), blocks (silent pauses where speech is temporar…
- Dysgraphia (Disorder of written expression, Specific learning disorder in written expression)
- A neurological learning disability that affects written expression, including handwriting legibility, spelling accuracy, and the ability to organize thoughts in writing. Dysgraphia can make text entry…
- Dyskinesia (Levodopa-Induced Dyskinesia, LID)
- A movement disorder characterized by involuntary, uncontrollable movements such as twitching, swaying, or jerking, most commonly associated with long-term use of levodopa medication for Parkinson's di…
- Dyslexia
- A specific learning disability that primarily affects reading, writing, and spelling skills. Dyslexia is neurological in origin and is characterized by difficulties with accurate or fluent word recogn…
- Dyslexia (Reading Disability, Developmental Dyslexia)
- A neurologically-based learning disability that primarily affects the acquisition and processing of written language, manifesting as difficulties with reading, writing, spelling, and phonological proc…
- Dyslexia Screening (Dyslexia Assessment, Reading Disability Screening)
- The process of identifying individuals who may be at risk for dyslexia, typically through standardized tests that assess reading fluency, phonological awareness, rapid naming, and other cognitive indi…
- Dysphagia (Swallowing Disorder, Swallowing Difficulty)
- A swallowing disorder that makes it difficult or impossible to move food or liquid from the mouth to the stomach safely. Dysphagia commonly occurs alongside communication disorders following stroke, t…
- Dysphonia (voice disorder, phonation disorder)
- A voice disorder characterized by abnormal pitch, loudness, quality, or resonance of the voice resulting from impaired function of the larynx or vocal cords. Dysphonia can range from mild hoarseness t…
- Dyspnea (Breathlessness, Shortness of Breath)
- A subjective experience of breathing discomfort consisting of qualitatively distinct sensations that vary in intensity, as defined by the American Thoracic Society. People who experience dyspnea commo…
- Dyspraxia (Developmental Coordination Disorder, DCD)
- A neurodevelopmental condition affecting motor planning, coordination, and the sequencing of movements. People with dyspraxia have difficulty translating intended actions into coordinated physical mov…