tendinous sheath of flexor pollicis longus muscle
the palmar carpal synovial tendon sheath that envelops the tendon of the flexor pollicis longus in its course through the carpal canal; it is continuous with the digital sheath of the thumb, the two generally being considered as one sheath.
Synonym(s): vagina tendinis musculi flexoris pollicis longiTA, radial bursa
Search Stedman's Medical Dictionary
Examples: glitazone, GI cocktail, etc.