psammon

The definition of a psammon is a group of microorganisms that live in between grains of sand in the water.

(noun)

An example of a psammon is a group of these creatures living on a seashore.

See psammon in Webster's New World College Dictionary

noun

Ecol. a group of those microorganisms that live in the water held between sand grains in waterlogged sands

Origin: ModL < Gr psammos, sand

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