hemera

noun
hem·​era | \ ˈhemərə \
plural hemerae\ -​ə(ˌ)rē \ also hemera

Definition of hemera

1 : a stratigraphic zone comprising the time range of a particular fossil species
2 : a period of time during which a race of organisms is at the apex of its evolution

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History and Etymology for hemera

New Latin, from Greek hēmera day; akin to Greek ēmar day, Armenian aur

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Cite this Entry

“Hemera.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/hemera. Accessed 19 Jan. 2021.

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