branchio-, branchi-

In zoology, the lack of gills and branchiæ; abranchiate; abranchious; debranchiate: In his book, Jill found out that earthworms were abranchial because their respiratory processes were carried out by the moist skin.

Without gills; no gills: An example of an abranchiate mammal is a whale.

A “gill lizard” was a very early amphibian from early Carboniferous of the early Permian period (roughly 300 million years ago). It was not a dinosaur.

With gills not visible from the outside.

Having the gills concealed; specifically, applied to certain divisions of crustacea, gastropods, etc.

Having the gills on the sides of the body, under the margin (space between one edge or line and another one) of the mantle (fold or pair of folds of the body wall that lines the shell of mollusks and brachiopods (marine animals with bivalve shells).

A class of Mollusca including all those that have bivalve shells, as the clams, oysters, mussels, etc.

They usually have two (rarely but one) flat, lamelliform gills on each side of the body. They have an imperfectly developed head, concealed within the shell, whence they are called Acephala.

The tubes of the mantle being assumed to be branchia or gills.

1. Around the bronchi or bronchial tubes; as, the peribronchial lymphatics.
2. Surrounding the branchiae; such as, a peribranchial cavity.

A group of gastropods having the gills arranged round the anus.

Applied to a gland in the neck which in many lower vertebrates regulates the calcium level in the body but in man and several higher vertebrates is absorbed into the thyroid during embryonic life.