a. [f. L. branchi-æ (see prec.) + -AL 1: cf. Fr. branchial.] Pertaining to, of the nature of, or resembling gills.
1801. Phil. Trans., XCI. 246. The branchial appendages … are of a deep blood colour.
1836. Todd, Cycl. Anat. & Phys., I. 115/2. The bilocular heart of fishes is entirely branchial.
