carpal tunnel (carpal canal)

The passageway deep to the transverse carpal ligament between the tubercles of the scaphoid & trapezoid bones on the radial side & the pisiform & hook of hamate on the ulnar side. - median nerve & the flexor tendons of the fingers & thumb pass through this passageway; sometimes results in median nerve compression

Related

carpal groove carpal tunnel syndrome (median neuropathy)

References

Stedman's Medical Dictionary 27th ed, Williams & Wilkins, Baltimore, 1999.