
1) Estivate 2) Sleep 3) Sleep during summer 4) Slumber
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https://www.crosswordclues.com/clue/aestivate

1) Estivate
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https://www.crosswordclues.com/clue/aestivate

to be inactive during warm dry periods
Found on
http://australianmuseum.net.au/Glossary-of-fish-terms

To pass the summer in a certain manner or condition, often in a dormant or torpid state (Morris 1992). It is when animals, especially desert animals, go into a state of torpor or hibernation in response to very dry conditions or hot temperatures. They usually emerge for a period of activity in the fall of the year.
Found on
http://imnh.isu.edu/digitalatlas/bio/glsry.htm

• (v. i.) To spend the summer. • (v. i.) To pass the summer in a state of torpor.
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http://thinkexist.com/dictionary/meaning/aestivate/

to become dormant in summer
Found on
http://www.calflora.net/botanicalnames/botanicalterms.html

The behavior of laying dormant in the Summer to avoid heat or drought
Found on
http://www.coastalplainsreptiles.com/glossary.htm

to become dormant in summer
Found on
http://www.encyclo.co.uk/local/21767

To aestivate is to lay dormant for the summer. Aestivation is similar to the familiar hibernation that many animals do, but is carried out by those creatures that don't like hot, dry weather. Such as the snail. Aestivation is not uncommon in animals who live in hot climates, especially those who require a degree of moisture, thus both land and wate...
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http://www.probertencyclopaedia.com/browse/BA.HTM

(L: aestus heat; aestivare to sleep through the summer heat, in a state of torpor) being dormant during summer or dry season, much like hibernation which is being dormant during winter.
Found on
http://www.seafriends.org.nz/books/glossary.htm

estivation, aestivation, estivate, aestivate 1. Passing the summer or dry season in a dormant or torpid state. 2. The manner in which plant structures are folded prior to expansion or opening.
Found on
http://www.wordinfo.info/words/index/info/view_unit/768/
No exact match found.