Definition of furculae:
(n) :
(ornithology) The forked bone formed by the fusion of the clavicles in birds, the wishbone or merrythought.
(n) :
(anatomy) A forked process or structure, generally two-pronged.
(n) :
(entomology) The (two-pronged) forked, somewhat tail-like organ held bent forward and secured by a catch beneath most species of Collembola (springtails), with which they jump by releasing the catch abruptly when alarmed.