Perennibranchiate

a. [ See Perennial, and Branchiate. ] 1. (Anat.) Having branchæ, or gills, through life; -- said especially of certain Amphibia, like the menobranchus. Opposed to caducibranchiate. [ 1913 Webster ]

2. (Zool.) Belonging to the Perennibranchiata. [ 1913 Webster ]