Diplozoon

noun

Dip·​lo·​zo·​on

ˌdipləˈzōˌän

: a genus of monogenetic trematode worms parasitic upon the gills of fishes (such as minnows) and unique among animals in that two larvae fuse together permanently at the middle of their bodies forming an individual shaped like an X and only double individuals thus formed are capable of becoming sexually mature

Word History

Etymology

New Latin, from dipl- + -zoon

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