Nucleate: with, or having a nucleus.
Nucleolus: the small portion of matter in the nucleus most readily affected by staining fluids.
Nucleus: a well-defined, differentiated, round or oval body imbedded in the cell contents.
Nude -us: naked: a surface devoid of hair, scales or other vestiture.
Nuditas: = nudity.
Nudity: the state of being naked or bare of vestiture.
Nurses: worker ants or worker bees which care for the eggs, larvae and pupae, but do not forage, the latter function being taken up later, when nursing is given up.
Nutant: nodding; the tip bent toward the horizon.
Nutritive chamber: an enlarged section of ovarian tube, filled with granular nutritive material used in developing the egg cells.
Nymph: the larval stage of insects with incomplete metamorphosis: applies also to their pupal stage, and sometimes used as = pupa.