verb (used without object), estivated, estivating.
to spend the summer, as at a specific place or in a certain activity.
Zoology. to spend a hot, dry season in an inactive, dormant state, as certain reptiles, snails, insects, and small mammals.
Compare hibernate.

1620–30; < Latin aestīvātus, past participle of aestīvāre to reside during the summer (akin to aestīvus of or relating to summer); see -ate1

estivator, noun

estivate, hibernate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
aestivate or estivate (ˈiːstɪˌveɪt, ˈɛs-, ˈiːstɪˌveɪt, ˈɛs-)
1.  to pass the summer
2.  Compare hibernate (of animals such as the lungfish) to pass the summer or dry season in a dormant condition
[C17: from Latin aestīvātus, from aestīvāre to stay during the summer, from aestās summer]
estivate or estivate
[C17: from Latin aestīvātus, from aestīvāre to stay during the summer, from aestās summer]
'aestivator or estivate
'estivator or estivate

estivate (ˈiːstɪˌveɪt, ˈɛs-)
(intr) the usual US spelling of aestivate

Collins English Dictionary - Complete & Unabridged 10th Edition
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Example sentences
Their goal is to find root systems or small mammal burrows in which to estivate over the hot summer.
By mid to late summer, squirrels return to their burrows to estivate and eventually hibernate.
Since snails lose weight when they estivate in summer, some growers do not stock pens by weight but by count.
They estivate during the hot weather and hibernate during the cold weather.
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