n. An obsolete form of lap.A little lap, flap, or pendant, especially on a coat or a head-dress.In ornithology, a wattle or other fleshy process hanging from a bird's head.One of certain bombycid moths, as Lasiocampa quercifolia: an English book-name. The small lappet isTo cover with or as with a lappet.n. In biology, a small lobe-shaped organ, such as the lappets of certain nemertean larvæ, etc.n. Same as tegula.n. In paleontology, an ear-like crest formed in some nautiloid cephalopods, as Lituites and Ophidioceras, by an extension of the lateral margins of the aperture of the shell.