The Collaborative International Dictionary
Precomposed
Precompose \Pre`com*pose"\, v. t. [imp. & p. p. Precomposed;
p. pr. & vb. n. Precomposing.]
To compose beforehand.
--Johnson.
Wiktionary
precomposed
a. 1 composed in advance 2 (context computing English) composed of a base character and a diacritical mark