aestivation
  夏眠
  aes·ti·va·tion /ˌɛstəˈveʃən/ 名詞
  (拉aestivatio)花被卷疊式,夏眠,夏蟄
  Æs·ti·va·tion n.
  1. Zool. The state of torpidity induced by the heat and dryness of summer, as in certain snails; -- opposed to hibernation.
  2. Bot. The arrangement of the petals in a flower bud, as to folding, overlapping, etc.; prefloration.
  [Spelt also estivation.]
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  aestivation
       n 1: (zoology) cessation or slowing of activity during the
            summer; especially slowing of metabolism in some animals
            during a hot or dry period [syn: estivation]
       2: (botany) the arrangement of sepals and petals in a flower
          bud before it opens [syn: estivation]