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Meridion
noun
Me·rid·i·on
\mə̇ˈridēˌän\
Definition of Meridion
: a genus (coextensive with the family Meridionaceae) of freshwater pennate diatoms having cuneate cells arranged in flat, fan-shaped, or spiral colonies and often causing odors in public water supplies
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Origin and Etymology of meridion
New Latin, from Greek, diminutive of merid-, meris part, portion
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