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Bible Dictionaries
Frustule

Webster's Dictionary

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(n.) The siliceous shell of a diatom. It is composed of two valves, one overlapping the other, like a pill box and its cover.

Bibliography Information
Webster, Noah. Entry for 'Frustule'. Noah Webster's American Dictionary. https://www.studylight.org/​dictionaries/​eng/​web/​f/frustule.html. 1828.
 
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