As an adjective biramous
is branching in two, composed of two branches.
As a noun exopod is
the outer ramus of a biramous limb of a crustacean.
biramous
English
Adjective
(-)
Branching in two, composed of two branches.
exopod
English
Noun
(en-noun)
(zoology) The outer ramus of a biramous limb of a crustacean