aestivation
Concise Oxford English Dictionary © 2008 Oxford University Press:
aestivation /ˌiːstɪˈveɪʃ(ə)n, ˌɛst-/ (US estivation)
▶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.
– derivatives
aestivate verb.
aestivate verb.
'aestivation' also found in these Oxford entries:

