Perennibranchiate
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Per`en`ni`bran´chi`ate
a. 1. (Anat.) Having branchæ, or gills, through life; - said especially of certain Amphibia, like the menobranchus. Opposed to caducibranchiate.
2. (Zool.) Belonging to the Perennibranchiata.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.