'aestivation' definitions:
Definition of 'aestivation'
From: WordNet
noun
(zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period [syn: estivation, aestivation]
noun
(botany) the arrangement of sepals and petals in a flower bud before it opens [syn: estivation, aestivation]