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sem•i

Pronunciation: (sem'ē, sem'ī), [key]
—n. Informal.
1. semitrailer (def. 1).
2. Often, semis. semifinal (def. 3).

semi-

a combining form borrowed from Latin, meaning “half,” freely prefixed to English words of any origin, now sometimes with the senses “partially,” “incompletely,” “somewhat”: semiautomatic; semidetached; semimonthly; semisophisticated.

semester hour

semi-abstract