noun which may take the genitive case particle 'no', noun
altricial; altricious
Biological term describing animals born in a helpless state, requiring parental care. Used as a noun or with の to modify another noun.
スズメは晩成性の鳥で、孵化したばかりの雛は目も開いていない。
Sparrows are altricial birds; newly hatched chicks have their eyes closed.
哺乳類の中には晩成性の種と早成性の種がいる。
Among mammals, there are altricial and precocial species.