Defn: One who omits. Fuller.
OMMATEAL
Om`ma*te"al, a. (Zoöl.)
Defn: Of or pertaining to an ommateum.
OMMATEUM
Om`ma*te"um, n.; pl. Ommatea. Etym: [NL., fr. Gr. (Zoöl.)
Defn: A compound eye, as of insects and crustaceans.
OMMATIDIUM
Om`ma*tid"i*um, n.; pl. Ommatidia. Etym: [NL., dim. of Gr. (Zoöl.)
Defn: One of the single eyes forming the compound eyes of crustaceans, insects, and other invertebrates.
OMNI-
Om"ni-. Etym: [L. omnis all.]
Defn: A combining form denoting all, every, everywhere; as in omnipotent, all-powerful; omnipresent.
OMNIBUS
Om"ni*bus, n. Etym: [L., for all, dat. pl. from omnis all. Cf. Bus.]