n. [ Perh. from F. écarté. ] A game at cards, that may be played by two, three, or four persons, the highest card (except when an extra card called the Joker is used) being the knave of the same suit as the trump, and called right bower, the lowest card used being the seven, or frequently, in two-handed euchre, the nine spot. See Bower. [ 1913 Webster ]

v. t. 1. To defeat, in a game of euchre, the side that named the trump. [ 1913 Webster ]

2. To defeat or foil thoroughly in any scheme. [ Slang. ] [ 1913 Webster ]

a. [ Gr. &unr_; well-colored; e'y^ well + &unr_; color. ] (Chem.) Having a fine color. [ 1913 Webster ]

Euchroic acid (Chem.), an organic, imide acid, obtained as a colorless crystalline substance, C12H4N2O8 by heating an ammonium salt of mellitic acid. By reduction it is changed to a dark blue substance (euchrone), -- hence its name. [ 1913 Webster ]

n. [ See Euchroic. ] (Min.) A mineral occurring in transparent emerald green crystals. It is hydrous arseniate of copper. [ 1913 Webster ]

pos>n. (Chem.) A substance obtained from euchroic acid. See Eychroic. [ 1913 Webster ]