n. (Anat.) (a) The palm of the hand. (b) The prominence of the palm above the base of the thumb; the thenar eminence; the ball of the thumb. Sometimes applied to the corresponding part of the foot. [ 1913 Webster ]
n. [ Named after the French chemist, L. J. Thénard. ] (Min.) Anhydrous sodium sulphate, a mineral of a white or brown color and vitreous luster. [ 1913 Webster ]