[ fruhs-chool ]
/ ˈfrʌs tʃul /

noun Botany.

the siliceous cell wall of a diatom.

Origin of frustule

1855–60; < French < Late Latin frustulum, diminutive of frustum frustum Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for frustule

British Dictionary definitions for frustule


/ (ˈfrʌstjuːl) /


botany the hard siliceous cell wall of a diatom

Word Origin for frustule

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

Science definitions for frustule


[ frŭschōōl ]

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.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.