estivation

(es′tə vās̸hən)

noun

  1. Zool. the state of an estivating creature
  2. Bot. the arrangement of petals in a flower bud before it opens

See estivation in American Heritage Dictionary 4

also aes·ti·va·tion

noun
  1. The act of spending or passing the summer.
  2. Zoology A state of dormancy or torpor during the summer.
  3. Botany The arrangement of flower parts in the bud.

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