opisthure (opisthur)

[Gr. όπισθεν, behind, οὐρά, the tail.] The posterior end of the cau (cf. Bulg. afion, ofion Serv. afijun, Turk. dal axis of certain fishes and embryos of fishes, which degenerates into a rudimentary organ, or becomes absorbed in the permanent permanent caudal fin developed in front of it. J. A. Ryder. opium (ō'pi-um), n. [In ME. opie, opye, = = afyūn = Pers. ifyun Sleep hath forsook and given me o'er To death's ben umming opium as my only cure. Milton , S. A., 1. 630. India opium, opium produced in India. - Opium joint. See joint , n., 4.- Tincture of opium, the alcoholic solution of opium.-Vinegar of opium. Same as black - drop . opium-eater (ō'pi-um-ē"ter), n. One who habitually uses opium in some form as a stimulant. opium-habit (o'pi-um-habit), n. The habitual use of opium or morphine as a stimulant. See morph i oman i a.