• WordNet 3.6
    • n aestivation (botany) the arrangement of sepals and petals in a flower bud before it opens
    • n aestivation (zoology) cessation or slowing of activity during the summer; especially slowing of metabolism in some animals during a hot or dry period
    • ***
Chambers's Twentieth Century Dictionary
    • n AEstivation es-ti-vā′shun (bot.) the manner of folding of the petals in the flower-bud: :
    • n AEstivation es-ti-vā′shun (zool.) the act of remaining dormant during the dry season—opposed to Hibernation
    • n AEstivation es-ti-vā′shun (Bacon) the passing of the summer: a summer retreat.
    • ***


Chambers's Twentieth Century Dictionary
L. æstivus, relating to summer—æstas, summer.


In literature:

Hunter, Dr. John, his theory of aestivation, 356.
"Sketches of the Natural History of Ceylon" by J. Emerson Tennent
I may remark, that the aestivation of Kydia is scarcely valvate.
"Journals of Travels in Assam, Burma, Bhootan, Afghanistan and TheNeighbouring Countries" by William Griffith
Aestival: occurring in summer.
"Explanation of Terms Used in Entomology" by John. B. Smith
The aestivation is best seen by making a slice across the flower-bud; and it may be expressed in diagrams, as in the accompanying figures.
"The Elements of Botany" by Asa Gray
The parts of the several verticils often differ in their mode of aestivation.
"Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 5" by Various
In such cases the insect must aestivate rather than hibernate.
"Butterflies Worth Knowing" by Clarence M. Weed
A second factor is the availability of necessary shelter, especially aestivation sites.
"A Distributional Study of the Amphibians of the Isthmus of Tehuantepec, Mexico" by William E. Duellman
When aestivation is at end, We've had our fun and seen our friend.
"Julia Ward Howe" by Laura E. Richards
Of the physiology of aestivation nothing definite appears to have been ascertained.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4" by Various
AEstivation of corolla induplicate-valvate.
"The Manual of the Botany of the Northern United States" by Asa Gray

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