Definition of diatom
: any of a class (Bacillariophyceae) of minute planktonic unicellular or colonial algae with silicified skeletons that form diatomaceous earth
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Recent Examples of diatom from the Web
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Carbon-dating of the mud showed that some of those diatoms had been deposited in what is now Lake Whillans as recently as 10,000 years ago—which was startling enough.
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Get Some Diatomaceous Earth Diatomaceous Earth, or DE, is a white crumbly powder consisting of the fossilized remains of diatoms, a class of algae.
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For instance, some of the evidence for the climate hypothesis comes from pollen and diatoms from the bottom of nearby Lake Ossa.
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Diatoms, on the other hand — another type of phytoplankton found in the Black Sea — can make the water look somewhat darker.
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Algae diatoms need nitrate for biochemical processes, including the production of domoic acid.
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The lake’s troubles may have begun with a diatom mine that operated from the late 1960s until 2004.
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The fluffy green globes—supersize diatoms as large as a head of cabbage—are one of the planet’s most unusual plants.
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'diatom.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
Origin and Etymology of diatom
ultimately from Greek diatomos cut in half, from diatemnein to cut through, from dia- + temnein to cut — more at tome
Medical Dictionary
Learn More about diatom
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See words that rhyme with diatom Britannica.com: Encyclopedia article about diatom
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