phalanx, gen. phalangis, pl. phalanges (fa´langks, fa-langks´; fa-lan´jis; -jez)

1. [NA] One of the long bones of the digits, 14 in number for each hand or foot, two for the thumb or great toe, and three each for the other four digits; designated as proximal, middle, and distal, beginning from the metacarpus. 2. One of a number of cuticular plates, arranged in several rows, on the surface of the spiral organ (of Corti), which are the heads of the outer row of pillar cells and of phalangeal cells; between them are the free ends of the hair cells. [L. fr. G. phalanx (-ang-), line of soldiers, bone between two joints of the fingers and toes]
tufted p. one of the terminal phalanges of the fingers in acromegaly; it has an expanded extremity resembling a sheaf of wheat.
ungual p. the distal p. of each of the digits; so called because of the flattened tuberosity at its termination which supports the nail.


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