This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

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n. Any of various microscopic one-celled or colonial algae of the class Bacillariophyceae, having cell walls of silica consisting of two interlocking symmetrical valves.

n. One of the Diatomaceae, a family of minute unicellular algae having a siliceous covering of great delicacy.

n. One of the Diatomaceæ, a family of minute unicellular Algæ having a siliceous covering of great delicacy, each individual multiplying by spontaneous division. By some authors diatoms are called Bacillariæ, but this word is not in general use.

n. A particle or atom endowed with the vital principle.

n. A member of the Diatomaceæ;

n. microscopic unicellular marine or freshwater colonial alga having cell walls impregnated with silica

"The name diatom comes from a Greek word diatomos that means cut in half, because the shells of diatoms have two overlapping, symmetrical halves."

phytoplankton    alga    algae   

diatom prism   

bacillariae   

diatomite    diatomaceous   

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