Main Entry: hemi·chor·date

Pronunciation: \-ˈkȯr-dət, -ˈkȯr-ˌdāt\

Function: noun

Etymology: New Latin Hemichordata, from hemi- + Chordata chordates

Date: 1885

: any of a phylum (Hemichordata) of wormlike marine animals (as an acorn worm) that have in the proboscis an outgrowth of the pharyngeal wall which superficially resembles the notochord of chordates