(n) :
(zoology) Any animal, of the subphylum Deuterostomia, in which the initial pore formed during gastrulation becomes the anus, and the second pore becomes the mouth.
(n) :
(zoology) Any animal, of the subphylum Deuterostomia, in which the initial pore formed during gastrulation becomes the anus, and the second pore becomes the mouth.