n.
Pronunciation: - ' ko ̇ r-d ə t, - ' ko ̇ r- ˌ d ā t
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