'larval' definitions:

Definition of 'larval'

From: WordNet
adjective
Immature of its kind; especially being or characteristic of immature insects in the newly hatched wormlike feeding stage; "larval societies"; "larval crayfishes"; "the larval stage"
adjective
Relating to or typical of a larva; "the larval eye"

Definition of 'larval'

From: GCIDE
  • larval \lar"val\ (l[aum]r"val), a. [L. larvalis ghostly. See Larva.] (Zool.) Of or pertaining to a larva. [1913 Webster]