Aestivation

Æs`ti*va"tion, n.

1. (Zoöl.)

Defn: The state of torpidity induced by the heat and dryness of summer, as in certain snails; -- opposed to hibernation.

2. (Bot.)

Defn: The arrangement of the petals in a flower bud, as to folding, overlapping, etc.; prefloration. Gray. [Spelt also estivation.]