Medical Definition of phalanx
plural pha·lan·ges \fə-ˈlan-(ˌ)jēz, fā-, ˈfā-ˌ, British usually fal-ˈan-\play
: any of the digital bones of the hand or foot distal to the metacarpus or metatarsus of a vertebrate that in humans are three to each finger and toe with the exception of the thumb and big toe which have only two each
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