Navicular \Na*vic"u*lar\, a. [L. navicularius, fr. navicula, dim. of navis ship: cf. F. naviculaire.]

1. Of, pertaining to, or resembling, a boat or ship.

2. Shaped like a boat; cymbiform; scaphoid; as, the navicular glumes of most grasses; the navicular bone.

Navicular bone. (Anat.)
   (a) One of the middle bones of the tarsus, corresponding to the centrale; -- called also scaphoid.
   (b) A proximal bone on the radial side of the carpus; the scaphoid.

Navicular disease (Far.), a disease affecting the navicular bone, or the adjacent parts, in a horse's foot.

Source: Webster's Revised Unabridged Dictionary (1913)
 

Scaphoid \Scaph"oid\ (?; 277), a. [Gr. ska`fh a boat + -oid: cf. F. scapho["i]de.]

(Anat.) Resembling a boat in form; boat-shaped. -- n. The scaphoid bone.

Scaphoid bone
   (a) One of the carpal bones, which articulates with the radius; the radiale.
   (b) One of the tarsal bones; the navicular bone. See under Navicular.

Source: Webster's Revised Unabridged Dictionary (1913)