Definition of phytolith
: a microscopic siliceous particle that is formed by a plant and that is highly resistant to decomposition ancient vegetation revealed by phytoliths
Recent Examples of phytolith from the Web
Less than a tenth of an ounce of soil might yield thousands of phytoliths, says Dolores Piperno, a phytolith expert at the Smithsonian who was not involved in the study.
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