- The earliest series of stages in metamorphosis following hatching in the development of hemimetabolous insects (locusts); the nymph resembles the adult in many respects, but lacks full wing or genitalia development; it grows through successive instars without any intermediate or pupal stage into the imago or adult form.
- The third stage in the life cycle of a tick, between the larva and the adult.
[G. nymphe, maiden]
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Examples: glitazone, GI cocktail, etc.