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Microscolex

noun
Mi·​cro·​scolex

Definition of Microscolex 

: a genus of earthworms containing a species (M. phosphoreus) native to South America but now widely distributed that is sometimes highly luminescent and gives a greenish yellow light resembling that of a glowworm

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History and Etymology for Microscolex

New Latin, from micr- + -scolex

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