plumule definition

  • noun:
    • A down feather.
    • Botany The rudimentary terminal bud of a plant embryo situated after the hypocotyl, comprising the epicotyl and sometimes of immature leaves.
    • initial bud, or gemmule, of a young plant; the bud, or developing point, associated with embryo, over the cotyledons.
    • A down feather.
    • The aftershaft of a feather.
    • One of the featherlike scales of certain male butterflies.
    • The first bud, or gemmule, of a plant; the bud, or growing point, associated with the embryo, over the cotyledons. See Illust. of radicle.
    • A down feather.
    • The aftershaft of a feather. See Illust. under Feather.
    • among the featherlike machines of specific male butterflies.
    • In ornithology, a down-feather; a feather of plumulaceous framework throughout.
    • In entomology: A little plume-like organ or ornament.
    • One Of Several particular obcordate scales found on the wings of certain lepidopterous pests, as Pieridæ.
    • The bud of ascending axis of a plant while however in embryo, situated in the apex for the caulicle (or radicle), above the base of the cotyledon or cotyledons, and inclosed by them whenever there are several.
    • down feather of younger wild birds; persists in a few person birds

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