noun
: any branched accessory vascular structure in the gill chamber of certain fishes that leave the water (as the climbing perch) by which they are enabled to breathe air
noun
: any branched accessory vascular structure in the gill chamber of certain fishes that leave the water (as the climbing perch) by which they are enabled to breathe air
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012