Glossary
Terms used in accessibility research and practice. Each entry has a definition, common aliases, and category tags.
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- Text Justification(also: Text Alignment, Justified Text)
- The alignment of text along the left and/or right margins of a text block. Left-aligned (ragged right) text has even spacing between words and an uneven right edge, while fully justified (left-right) text has even margins on both sides but variable word spacing. Some…
- Tiresias(also: Tiresias Screenfont, Tiresias Font Family)
- A family of typefaces developed in 1998 by the Royal National Institute of Blind People (RNIB) specifically designed for legibility on screen displays, particularly television subtitling. Named after the blind prophet of Greek mythology, Tiresias became one of the most widely…
- Typeface Classification(also: Font Classification, Typeface Categories)
- The set of broad categories used to describe and compare typefaces. The most common groupings are: serif (letters with small projecting strokes at terminals, e.g. Times, Roboto Serif), sans-serif (no terminal strokes, e.g. Helvetica, Arial, Roboto), slab serif (heavy…
- Typographic Modulation(also: Typographic Variation, Dynamic Typography)
- Systematic variation of a typeface's visual parameters — weight, width, slant, size, colour, letter spacing, baseline shift, opacity — to carry information beyond the literal words, typically driven by an external signal such as speech pitch, loudness, emotional arousal, or…
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