a. [ L. extans, -antis, or exstans, -antis, p. pr. of extare, exstare, to stand out or forth; ex out + stare to stand: cf. F. extant. See Stand. ]
That part of the teeth which is extant above the gums. Ray. [ 1913 Webster ]
A body partly immersed in a fluid and partly extant. Bentley. [ 1913 Webster ]
Writings that were extant at that time. Sir M. Hale. [ 1913 Webster ]
The extant portraits of this great man. I. Taylor. [ 1913 Webster ]
adj. No longer existing; inaccessible through loss or destruction. [ WordNet 1.5 ]
Its nonextant original was written on vellum G. B. Saul
n. [ L. sextans, -antis, the sixth part of an as, fr. sextus sixth, sex six. See Six. ]
Box sextant,