Definition of biramous in English:

biramous

adjective

Zoology
  • (especially of crustacean limbs and antennae) dividing to form two branches.

    • ‘The appendages are primitively branched, and although this condition is modified in many species, adults always have at least some biramous appendages.’
    • ‘The anteriormost five abdominal appendages are, almost without exception, biramous.’
    • ‘An answer lies, he says, in the origin and modification of the ancestral biramous limb.’
    • ‘My biramous appendages are quivering, Mr. President.’
    • ‘About ten limbs appear to have been present, which may have been biramous.’

Origin

Late 19th century: from bi- two + ramus + -ous.

Pronunciation:

biramous

/bīˈrāməs/