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oncolite

American  
[ahn-koh-lahyt] / ˈɑn koʊˌlaɪt /

noun

plural

oncolites

  1. Geology. a stromatolite with a spherical shape.

oncolite Scientific  
/ ŏn′kə-līt′ /

  1. A stromatolite that is spherical rather than dome-shaped. Oncolites usually form around a nucleus consisting of a detrital fragment (such as a shell fragment or a grain of sand) and are less than 10 cm (3.9 inches) in diameter.

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.