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D_____
Definitions
microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica
Word origin
From (deprecated) genus name Diatoma, from Ancient Greek διάτομος (diátomos, “cut through, cut in half”).
Used in a sentence
“Diatoms are enclosed in two shells that fit together like a pillbox.”
“Diatoms are characterized by a cell wall called a fistula made of silica, which usually has two overlapping sections.”
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
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