WordNet
n. occurs in some mollusks and in tadpoles and other immature amphibians
Usage examples of "external gill".
At first I had taken them for lelts, skittering about the rafts, even to the fern-like filaments at the sides of their head, but these filaments, in the case of the salamanders, interestingly, are not vibration receptors but feather gills, an external gill system.
At first I had taken them for lelts, skittering about the rafts, even to the fernlike filaments at the sides of their head, but these filaments, in the case of the salamanders, interestingly, are not vibration receptors but feather gills, an external gill system.
The lizard (twice as big as Easy and man-branded on his left hinder haunch with a crusty cross) was trying to protect the external gill/lung arrangement that fluttered along his neck.