Definitions from Wiktionary (gemmule)

▸ noun:  (biology)
▸ noun:  (archaic) Synonym of gemma (“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 a new individual can develop”)
▸ noun:  (specifically, zoology) A small gemma or bud of dormant embryonic cells produced by some freshwater sponges (phylum Porifera) that develops into a new sponge.
▸ noun:  (historical) In the obsolete theory of pangenesis propounded by the English scientist Charles Darwin (1809–1882): a hypothetical particle once thought to be the basis of heredity.
▸ noun:  (botany) Synonym of plumule (“the first bud, or growing point, of a plant embryo, situated above the cotyledons”)
▸ noun:  (neurology) Synonym of dendritic spine (“a small membranous protrusion from the dendrite of a neuron that typically receives input from a single axon at the synapse”)





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