单词	aestivation
释义	aestivation /ˌiːstɪˈveɪʃ(ə)n / /ˌɛstɪˈveɪʃ(ə)n/ (US estivation) noun [mass noun] 1 Zoology Prolonged torpor or dormancy of an insect, fish, or amphibian during a hot or dry period.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.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.
随便看	Arabist arabitol Arabization Arabize arable Arab League Arab Legion Arab nationalism Arab nationalist Arabophil Arabophile Arab Spring Arab street Arab world Araby Aracajú aracari a race against time a race to (or for) the bottom arachidonic acid arachis oil Arachne arachnid Arachnida arachnodactyly

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