deuterostome
noun
deu·tero·stome
| \ ˈdü-tə-rō-ˌstōm
also ˈdyü-\
also ˈdyü-\
Definition of deuterostome
: any of a major division (Deuterostomia) of the animal kingdom that includes the bilaterally symmetrical animals (such as the chordates) with indeterminate cleavage and a mouth that does not arise from the blastopore
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