What is "teneral"

Teneral \Ten"er*al\, a. [L. tener, -eris, tender, delicate.] (Zo["o]l.) Of, pertaining to, or designating, a condition assumed by the imago of certain Neuroptera, after exclusion from the pupa. In this state the insect is soft, and has not fully attained its mature coloring.

a. (context of an arthropod, etc. English) callow. In the pale, soft-bodied state that follows moulting, before the hardening and darkening of the cuticle, during which the creature is able to expand.