- Bot. the growing stem tip of the embryo of a seed, above the place of attachment of the cotyledons
- Ornithology a soft down feather of young birds, persisting in some adults
Origin of plumuleModern Latin from Classical Latin plumula, diminutive of pluma, feather: see plume
- A down feather.
- The young shoot of a plant embryo above the cotyledons, consisting of the epicotyl and often of immature leaves.
Origin of plumuleLatin plūmula diminutive of plūma feather