Kinorhyncha
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Ki·no·rhyn·cha | \ ˌkī-nō-ˈriŋ-kə 
, ˌkin-ō- \
, ˌkin-ō- \Medical Definition of Kinorhyncha
: a class of Aschelminthes or a separate phylum comprising minute marine worms of uncertain systematic position having certain resemblances to arthropods and annelids but probably more closely related to the nematodes
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