aestivation

• æstivation
• estivation

Formed from Latin aestīvō, aestīvāre (“to spend or pass the summer in a place”), from aestīvus (“of or pertaining to summer”), from aestās (“summer”) +‎ -īvus.

• IPA^(key): /ˌiːstɪˈveɪʃən/
• Rhymes: -eɪʃən

aestivation (countable and uncountable, plural aestivations)

1. (biology) A state of inactivity and metabolic depression during summer: the summer version of hibernation.
2. (botany) The arrangement (vernation) of the parts of a flower inside a bud; prefloration.
3. (obsolete) The spending or passing of a summer.
   • 1625, Francis [Bacon], “Of Building. XLV.”, in The Essayes […], 3rd edition, London: […] Iohn Haviland for Hanna Barret, →OCLC, page 263:

     On the Vnder Story, tovvards the Garden, Let it be turned to a Grotta, or Place of Shade, or Eſtiuation.

• aestivate

• (inactivity): torpor