abbreviation

adscript

allograph

ascender and descender

ascent and descent

baseline

character

compendium

See #abbreviation

contraction

See #abbreviation

cue height

See x height

descender

See Ascender and descender

diacritic

digraph

glyph

grapheme

A basic unit in the writing system of a (written) language. Like ‘character’, a ‘grapheme’ is an abstract term, but unlike ‘character’, it relates to the representation of phonemes. For instance, aoi represents one grapheme in modern Irish, but is composed of three different characters. Similarly, a character may be used for more than one grapheme.

letter

conceptually distinct from characters, graphemes and glyphs. A, a, a and a represent four different characters of the same letter.

ligature

majuscule

See #minuscule and majuscule

minim

minuscule and majuscule

A miniscule is a small alphabetic character; the majority of the text of a manuscript is made up of miniscule letters. A majuscule is a large alphabetic character, often used at the beginning of a sentence in Irish manuscripts.

nomina sacra

Latin for ‘sacred names’.

subscript

See superscript and subscript

superscript and subscript

suspension stroke

Tironian notes

Unicode

x height

Malcolm B. Parkes and Peter A. Stokes use the term ‘cue-height’ as the palaeographical equivalent.