also an·i·mal·cu·lum (-kyə-ləm)n., pl., -cules, also -cu·la (-kyə-lə).
- A microscopic or minute organism, such as an amoeba or paramecium, usually considered to be an animal.
- Archaic. A tiny animal, such as a mosquito.
[New Latin animalculum, diminutive of Latin animal, animal, from anima, soul. See anima.]






