noun. (botany) the arrangement of sepals and petals in a flower bud before it opens.
noun. (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period.
1. Noun, singular or mass Squirrels who live in very hot climates get away from the heat for a while in hibernationlike periods in the warm summer months known as estivation. 2. Verb, base form He will return to estivation if conditions become too dry again.
