The Collaborative International Dictionary
Branchiomerism
Branchiomerism \Bran`chi*om"er*ism\, n. [Gr. ? gill + -mere.]
(Anat.)
The state of being made up of branchiate segments.
--R.
Wiedersheim.
Wiktionary
branchiomerism
n. (context zoology English) The state of being formed of branchiate segments