gemmule

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gemmule

[′je·myül]
(biology)
Any bud formed by gemmation.
(invertebrate zoology)
A cystlike, asexual reproductive structure of many Porifera that germinates when proper environmental conditions exist; it is a protective, overwintering structure which germinates the following spring.
(neuroscience)
A minute dendritic process functioning as a synaptic contact point.