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frustule

[fruhs-chool]
noun Botany.
  1. the siliceous cell wall of a diatom.
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Origin of frustule

1855–60; < French < Late Latin frustulum, diminutive of frustum frustum
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for frustule

frustule

noun
  1. botany the hard siliceous cell wall of a diatom
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Word Origin

C19: from French, from Late Latin frustulum a small piece, from frustum a bit
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

frustule in Science

frustule

[frŭschōōl]
  1. The silica-rich cell wall of a diatom. Frustules are divided into two halves, and the intricate patterns of depressions and projections on each half help to identify individual diatom species.
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The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.