estivation

noun
es·​ti·​va·​tion | \ ˌe-stə-ˈvā-shən How to pronounce estivation (audio) \
variants: or aestivation

Definition of estivation

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

First Known Use of estivation

1783, in the meaning defined at sense 1

Learn More About estivation

Time Traveler for estivation

Time Traveler

The first known use of estivation was in 1783

See more words from the same year

Dictionary Entries Near estivation

estivate

estivation

estivo-autumnal

See More Nearby Entries 

Statistics for estivation

Cite this Entry

“Estivation.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/estivation. Accessed 10 Aug. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for estivation

estivation

noun
es·​ti·​va·​tion
variants: or aestivation \ ˌes-​tə-​ˈvā-​shən How to pronounce estivation (audio) \

Medical Definition of estivation

: the state of one that estivates

More from Merriam-Webster on estivation

Britannica.com: Encyclopedia article about estivation

WORD OF THE DAY

Test Your Vocabulary

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!