noun. (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period.
noun. (botany) the arrangement of sepals and petals in a flower bud before it opens.
1. Noun, singular or mass The only part of the frog's body that is not covered by the sheet is its nostrils, which allow it to breathe during aestivation.