biramous

[ bahy-rey-muh s ]

/ baɪˈreɪ məs /

consisting of or divided into two branches: a biramous appendage.

Also bi·ra·mose

[bahy-rey-mohs, bahy-ruh-mohs] /baɪˈreɪ moʊs, ˌbaɪ rəˈmoʊs/.

Origin of biramous

First recorded in 1875–80; bi-¹ + ramous

It is likely that the trunk-limbs were also biramous, with additional endites and exites.

Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 7 |Various
The anterior of the three pairs of Nauplius appendages (At1) is uniramous, and the two posterior (At2, and md) are biramous.

The Works of Francis Maitland Balfour, Volume II (of 4) |Francis Maitland Balfour
There are four pairs of biramous cephalic appendages, which differ only very slightly from the appendages of the thorax.

The Appendages, Anatomy, and Relationships of Trilobites |Percy Edward Raymond
Like some of the Ostracoda, the more primitive Copepoda have biramous antenn.

The Appendages, Anatomy, and Relationships of Trilobites |Percy Edward Raymond

The sixth segment of the abdomen has a pair of biramous appendages, which, with the telson, form a swimming-fan.

The Sea-beach at Ebb-tide |Augusta Foote Arnold

biramous

/ (ˈbɪrəməs) /

divided into two parts, as the appendages of crustaceans

biramous

[ bī-rā′məs ]

Consisting of or having two branches, as the appendages of an arthropod.