1. (a.) Hooded; cowled; covered, as with a hood.

2. (a.) Having the edges toward the base rolled inward, as the leaf of the commonest American blue violet.

3. (a.) Having the prothorax elevated so as to form a sort of hood, receiving the head, as in certain insects.

4. (a.) Having a hoodlike crest on the head, as certain birds, mammals, and reptiles.