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


(Zoology) divided into two parts, as the appendages of crustaceans


(baɪˈreɪ məs)

also bi•ra•mose


consisting of or divided into two branches: a biramous appendage.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Adj.1.biramous - resembling a forkbiramous - resembling a fork; divided or separated into two branches; "the biramous appendages of an arthropod"; "long branched hairs on its legson which pollen collects"; "a forked river"; "a forked tail"; "forked lightning"; "horseradish grown in poor soil may develop prongy roots"
divided - separated into parts or pieces; "opinions are divided"
References in periodicals archive ?
The biramous antennules of decapods, in particular, are considered the primary sensory organs for olfactory chemoreception and exclusively contain, on the outer flagellum, the aesthetasc sensilla, each innervated by hundreds of olfactory receptor neurons (Schmidt and Mellon, 2011 ).
A second region, the peraeon, of 7 segments, each with a pair of legs (peraeopods) and third region, pleaon, of 6 segments with pair of pleopods, except the last which together with biramous uropods form a swimming tail pleotelson [15].
The deeply biramous surstyli in combination with the apically projecting and very pointed cerci armed with three pairs of giant setae are diagnostic male characters not seen in other anthomyiid genera.
At the end of the abdomen is a pair of slender biramous appendages, the uropods.
Biramous limbs and nauplius larvae, apomorphic characters for crustaceans, can readily be optimized on an evolutionary tree, showing students why these taxa and other crustaceans share taxonomic identity.