na-adjective, noun which may take the genitive case particle 'no', noun
larva; larvae
Biological term for the early, often immature, form of an animal that undergoes metamorphosis. Used as a noun or adjectivally with な or の.
カエルの幼生はオタマジャクシと呼ばれる。
The larva of a frog is called a tadpole.
この虫は幼生の段階で冬を越す。
This insect overwinters in the larval stage.