The biramous appendages of an arthropod.    From Wordnet, Princeton University. 

Adjective : a biramous appendage.    From Dictionary.com. 

They have two pairs of antennae and biramous feeding appendages.    From Wordnik.com.  [Crustacea] Reference

Uropods are the last pair of abdominal appendages that are biramous and extend beyond the end of the abdomen.    From Wordnik.com.  [Crustacea] Reference

Those are the modified endopodites of pleopods inner branches of biramous abdominal limbs that have evolved to perform the function of sperm transfer.    From Wordnik.com.  [Is it a boy or a girl?] Reference

It has five pairs of biramous, setose and thoracopods.    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

It has five pairs of biramous, setose and thoracopods (appendages).    From Wordnik.com.  [CreationWiki - Recent changes [en]] Reference

The effect of the parasite in the male is that the abdomen is broader, the copulatory styles reduced, and biramous hairy appendages are developed similar to those of the female, but smaller.    From Wordnik.com.  [Hormones and Heredity] Reference