Definitions for "Animalcule"
microscopic organism such as an amoeba or paramecium
A tiny animal. It was once thought that seeds, sperm and embryos contained a minute version of the final animal.
An animal of microscopic smallness.
Keywords:  infusoria, naked, invisible, eye, see
An animal, invisible, or nearly so, to the naked eye. See Infusoria.
Keywords:  spider, fly, small
A small animal, as a fly, spider, etc.