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echi·uroid | \ ˌe-ki-ˈyu̇r-ˌȯid 
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\Definition of echiuroid
: any of a phylum (Echiura synonym Echiuroidea) of marine worms of uncertain taxonomic affinities that have a sensitive but nonretractile proboscis above the mouth
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Time Traveler for echiuroid
The first known use of echiuroid was circa 1889
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