bicephalousa.[Pref. bi- + cephalous: cf. F. bicphale.] Having two heads.()n.[L., two-headed; bis twice + caput head. See Capital.] (Anat.) A muscle having two heads or origins; -- applied particularly to a flexor in the arm, and to another in the thigh.()n.[Native name.] (Zol.) A remarkable ganoid fish (Polypterus bichir) found in the Nile and other African rivers. See Brachioganoidei.()