Defn: One of the Opisthobranchiata.
OPISTHOCOELIAN; OPISTHOCOELOUS
O*pis`tho*coe"li*an, O*pis`tho*coe"lous, a. Etym: [Gr. (Anat.)
Defn: Concave behind; — applied especially to vertebræ in which the anterior end of the centrum is convex and the posterior concave.
OPISTHODOME O*pis"tho*dome, n. Etym: [L. opisthodomus, Gr. do`mos house: cf. F. opisthodome.] (Arch.)
Defn: A back chamber; especially, that part of the naos, or cella, farthest from the main entrance, sometimes having an entrance of its own, and often used as a treasury.
OPISTHOGLYPHA
O*pis`tho*glyph"a, n. pl. Etym: [NL., from Gr. (Zoöl.)
Defn: A division of serpents which have some of the posterior maxillary teeth grooved for fangs.
OPISTHOGRAPHY
Op`is*thog"ra*phy, n. Etym: [Gr. -graphy.]
Defn: A writing upon the back of anything, as upon the back of a leaf or sheet already written upon on one side. [R.] Scudamore.
OPISTHOMI
Op`is*tho"mi, n. pl. Etym: [NL., fr. Gr. (Zoöl.)