FURCULA
furcula
(noun) a forked bone formed by the fusion of the clavicles of most birds
Source: WordNet® 3.1
Etymology
Noun
furcula (plural furculae or furculæ)
(anatomy) A forked process or structure, generally two-pronged.
(ornithology) The forked bone formed by the fusion of the clavicles in birds, the wishbone or merrythought.
(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.
Source: Wiktionary
Fur"cu*la, n. Etym: [L., a forked prop, dim. of furca a fork.]
(Anat.)
Definition: A forked process; the wishbone or furculum.
FURCULUM
Fur"cu*lum, n. Etym: [NL., dim. of L. furca a fork.] (Anat.)
Definition: The wishbone or merrythought of birds, formed by the united
clavicles.
Source: Webster’s Unabridged Dictionary 1913 Edition