My"sis (?), n. [NL., fr. Gr. a closing of the lips or eyes.] Zool.

A genus of small schizopod shrimps found both in fresh and salt water; the opossum shrimps. One species inhabits the Great Lakes of North America, and is largely eaten by the whitefish. The marine species form part of the food of right whales.


© Webster 1913.

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