aestivationPronunciation: /ˌiːstɪˈveɪʃ(ə)n, ˌɛst-/ (US estivation)Definition of aestivation noun [mass noun] 1 Zoology prolonged torpor or dormancy of an insect, fish, or amphibian during a hot or dry period. 2 Botany the arrangement of petals and sepals in a flower bud before it opens. Compare with vernation.aestivation in other Oxford dictionaries Definition of aestivation in the US English dictionary
