Oncolite meaning

ŏnkə-līt
A spherical stromatolite that usually forms around a fragment of detritus such as a piece of shell or a grain of sand.
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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.
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Origin of oncolite

  • Greek onkos mass oncology –lite

    From American Heritage Dictionary of the English Language, 5th Edition