crescentic,a.|krəˈsɛntɪk| [f. L. crēscent-em, taken in sense of crescent n. + -ic.] Having the form of a crescent or new moon; crescent-shaped. 1836Todd Cycl.Anat. I. 308/1 A large crescentic membraneous flap, or valve.1885H. O. Forbes Nat. Wand. iv. App. 364 Feathers..tipped with crescentic spots of white.