hemera

noun

hem·​era
ˈhemərə
plural hemerae
-ə(ˌ)rē
also 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

Word History

Etymology

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 16 Jun. 2024.

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