Com-. A prefix from the Latin preposition cum, signifying with, together, in conjunction, very, etc. It is used in the form com- before b, m, p, and sometimes f, and by assimilation becomes col- before l, cor- before r, and con- before any consonant except b, h, l, m, p, r, and w. Before a vowel com- becomes co-; also before h, w, and sometimes before other consonants.
Co"ma(k"m), n. [NL., fr. Gr. kw^ma lethargy, fr. koima^n to put to sleep. See Cemetery.] A state of profound insensibility from which it is difficult or impossible to rouse a person. See Carus.
Co"ma, n. [L., hair, fr. Gr. ko`mh.] 1. (Astron.) The envelope of a comet; a nebulous covering, which surrounds the nucleus or body of a comet.
(Bot.) A tuft or bunch, -- as the assemblage of branches forming the head of a tree; or a cluster of bracts when empty and terminating the inflorescence of a plant; or a tuft of long hairs on certain seeds.
Coma Berenices () [L.]
(Astron.), a small constellation north of Virgo; -- called also
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