D defs.my
Entry 2 senses Webster, 1913

Æstivation

· Æs·ti·va·tion · IPA
01 n. The state of torpidity induced by the heat and dryness of summer, as in certain snails; -- opposed to hibernation.
  1. 1.
    The state of torpidity induced by the heat and dryness of summer, as in certain snails; -- opposed to hibernation.(Zool.)
  2. 2.
    The arrangement of the petals in a flower bud, as to folding, overlapping, etc.; prefloration.(Bot.)