The story
From typographic + ligature.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: A character or glyph that visually combines multiple letters, often those of a digraph (such as æ, œ, ß or ij) but sometimes also others (such as fi or fl). (In English and various other languages, such characters and glyphs are not necessary to write or type in the standard orthography, but there are traditions of using them for aesthetic reasons.) Full definition →
From typographic + ligature.
Etymology from Wiktionary, CC BY-SA 4.0.