Curb 1
Curb 1 : (1) A frame around the mouth of a horizontal opening usually a fire place, sometimes used to contain spillages. (2) The horizontal timber at the intersection of the two pitches of a mansard (or curb) roof. Curie. Unit for measuring the amount of radioactivity in a substance. Equals 3. 700 x 1010 disintegrations/second, roughly equal to the activity of lg of radium. Abbrev. Ci