1. Noun A minute or microscopic animal, nearly or quite invisible to the naked eye, as an infusorian or rotifer; an animalculum: as, the bell- animalcule, a ciliate infusorian of the family Vorticellidæ; wheel- animalcule, a rotifer; bear- animalcule, a minute arachnidan of the order Arctisca

2. N animalcule Any little animal, as a mouse, insect, etc.; n animalcule A minute or microscopic animal, nearly or quite invisible to the naked eye, as an infusorian or rotifer; an animalculum: as, the bell-animalcule, a ciliate infusorian of the family Vorticellidæ; wheel-animalcule, a rotifer; bear-animalcule, a minute arachnidan of the order Arctisca

3. N Animalcule Any little animal, as a mouse, insect, etc.; n Animalcule A minute or microscopic animal, nearly or quite invisible to the naked eye, as an infusorian or rotifer; an animalculum: as, the bell-Animalcule, a ciliate infusorian of the family Vorticellidæ; wheel-Animalcule, a rotifer; bear-Animalcule, a minute arachnidan of the order Arctisca