What is "scaphoid bone"

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

1. One of the carpal bones, which articulates with the radius; the radiale.

2. One of the tarsal bones; the navicular bone. See under Navicular.

n. (anatomy) One of the carpal bones of the wrist.

n. the largest wrist bone on the thumb side [syn: os scaphoideum, navicular]

The scaphoid bone (from the Greek word scaphoides, boat-shaped) is one of the carpal bones of the wrist. It is situated between the hand and forearm on the thumb side of the wrist (also called the lateral or radial side). It forms the radial border of the carpal tunnel. The scaphoid bone is the largest bone of the proximal row of wrist bones, its long axis being from above downward, lateralward, and forward. It is approximately the size and shape of a medium cashew.