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diatomaceous

[dahy-uh-tuh-mey-shuh s] /ˌdaɪ ə təˈmeɪ ʃəs/
adjective
1.
consisting of or containing diatoms or their fossil remains.
Origin
1840-1850
1840-50; < New Latin Diatomace(ae) an order name (see diatom, -aceae) + -ous
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for diatomaceous

diatomaceous

/ˌdaɪətəˈmeɪʃəs/
adjective
1.
of, relating to, consisting of, or containing diatoms or their fossil remains
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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