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单词	estivation
释义	estivation noun es·​ti·​va·​tion ˌe-stə-ˈvā-shən  variants or aestivation 1 zoology : the state or condition of torpidity or dormancy induced by the heat and dryness of summer : the state of one that is estivating Some animals, including various species of snakes, land snails, and lizards, enter a state of dormancy, or estivation, in the summer when water is scarce. Carrol B. Fleming … they [land snails of the genus Cerion] spend most of this time in the warm weather equivalent of hibernation (called estivation), hanging upside down from vegetation or affixed to rocks. Stephen Jay Gould 2 usually aestivation, botany : the arrangement or position of the petals or sepals in a flower bud In practice, aestivation is best observed by making hand sections of mature flower buds … Michael G. Simpson … flowers on the same plants or the same stem may exhibit either clockwise or counterclockwise spiral estivations … Carlos Herrera compare vernation Word History First Known Use 1783, in the meaning defined at sense 1 Medical Definition estivation noun es·​ti·​va·​tion variants or aestivation ˌes-tə-ˈvā-shən  : the state of one that estivates
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