An asexual reproductive structure, as found in animals such as hydra (genus Hydra) and plants such as liverworts (division Marchantiophyta), consisting of a cluster of cells from which new individuals can develop; a bud.
The first bud, or growing point, of a plant embryo, situated above the cotyledons.
One of the featherlike scales of certain male butterflies.
The aftershaft of a feather.
A down feather.