Plu"mule (?), n. [L. plumula, dim. of pluma a feather; cf. F. plumule.]
The first bud, or gemmule, of a young plant; the bud, or growing point, of the embryo, above the cotyledons. See Illust. of Radicle.
2. Zool. (a)
A down feather.
The aftershaft of a feather. See Illust. under Feather.
One of the featherlike scales of certain male butterflies.
© Webster 1913.