plume: [14] Latin plūma originally denoted ‘down, feathers’ (it is probably related to English fleece). Eventually, though, it came to signify a ‘single feather’, and evolved in this sense to Italian piuma, Spanish pluma, and French plume – source of English plume. The derivative plumage [15] originated in Old French. => fleece, plumage
plume (n.)
late 14c., "a feather" (especially a large and conspicuous one), from Old French plume "soft feather, down; feather bed," and directly from Latin pluma "a feather, down; the first beard," from PIE root *pleus- "to pluck; a feather, fleece" (source of Old English fleos "fleece"). Meaning "a long streamer of smoke, etc." is first attested 1878.
plume (v.)
late 14c., "to pluck, strip," from plume (n.). From mid-15c. as "to adorn with plumes." Meaning "to dress the feathers" is from 1702. Related: Plumed; pluming.
