释义 |
hitchhiker thumb hitch·hik·er thumbmalposition of the thumb, that as a result of shortness of the first metacarpal, stands at right angles to the radial border of the hand and in the same place as it; a characteristic sign of diastrophic dwarfism.hitch·hik·er thumb (hich'hī'kĕr thŭm) Malposition of the thumb, which, as a result of shortness of the first metacarpal, stands at right angles to the radial border of the hand and in the same plane with it; a characteristic sign of diastrophic dwarfism. |