Synonym of the pupa or chrysalis stage found in insects with complete metamorphosis. The nymph is the final instar before the adult form. Nymphs are inactive and do not feed. Synonym of the larva in insects that go through incomplete metamorphosis. The nymph changes directly into the adult without going through a pupal stage; the nymph feeds and moves around. The term nymph is also used to describe the immature stages of acarians.