a. [f. Gr. ἔντερο-ν intestine + πνευστ-, f. πνέειν to breathe + -AL.] Of or pertaining to the Enteropneusta, worm-like animals having the breathing apparatus borne on the intestinal canal.
1877. Huxley, Anat. Inv. Anim., xii. 674, note. Either Vertebrate, Enteropneustal or Tunicate branchiæ.
