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1. The fused clavicles, which form the V-shaped bone (wishbone) of the bird's skeleton.
2. In the embryo, an inverted U-shaped elevation that appears on the ventral wall of the pharynx, being formed by the two linear ridges and the caudal part of the hypopharyngeal eminence; the depression enclosed by the U shape is the laryngotracheal groove.
[L. a forked prop, dim. of furca, a fork]
n. pl. furcu·lae (-lē′) Zoology
A forked part or bone, such as the wishbone of a bird. Also called fourchette.
- the wishbone (clavicle) of birds.
- the forked springing organ of COLLEMBOLA.
the united clavicles in birds; a spring-like connection between the two shoulder joints; called also wishbone.