one of the elements; a metal of a reddish white color, crystallizing in rhombohedrons. it is somewhat harder than lead, and rather brittle; masses show broad cleavage surfaces when broken across. it melts at 507¡ fahr., being easily fused in the flame of a candle. it is found in a native state, and as a constituent of some minerals. specific gravity 9.8. atomic weight 207.5. symbol bi.