Medical Definition of cyclops
1plural cy·clo·pes \sī-ˈklō-(ˌ)pēz\play : an individual or fetus abnormal in having a single eye or the usual two orbits fused
2 capitalized : a genus of minute free-swimming copepods that have a large median eye, a pear-shaped body tapering posteriorly, and long antennules used in swimming, that are widely distributed and abundant in fresh waters, that are important elements in certain aquatic food chains, and that directly affect humans as intermediate hosts of certain parasitic worms—see guinea worm
3plural cyclops : a copepod water flea of the genus Cyclops
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