Definition of aestivation in English:

aestivation

Line breaks: aes¦tiv|ation
Pronunciation: /ˌiːstɪˈveɪʃ(ə)n
 
, ˌɛst-/
(US estivation)

noun

[mass noun]
  • 1 Zoology Prolonged torpor or dormancy of an insect, fish, or amphibian during a hot or dry period.
    More example sentences
    • During winter months and aestivation periods, mussels will burrow into the substrate until only the apertures are protruding.
    • By shutting down their intestinal tracts during estivation, these anurans reduce their daily energy expenditure.
    • The period of aestivation is around eight months, though some experts claim that they can remain underground for more than five years.
  • 2 Botany The arrangement of petals and sepals in a flower bud before it opens. Compare with vernation.
    More example sentences
    • Prior to the aestivation of the calyx, pairs of stamen primordia are initiated.
    • Aestivation of the calyx is cochlear descending, which is a new character within Ingeae.
    • Just as commonly, petal aestivation was observed to be entirely imbricate.

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a slit made by cutting with a saw