Lappet
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A small decorative fold or flap, esp, of lace or muslin, in agarment or headdress. Swift. Lappet moth (Zoöl.), one of severalspecies of bombycid moths, which have stout, hairy caterpillars, flatbeneath. Two common American species (Gastropacha Americana, andTolype velleda) feed upon the apple tree.
Lappet meaning & definition 1 of Lappet.