The Collaborative International Dictionary of English v.0.48:
Sang-froid \Sang`-froid"\, n. [F., cold blood.] Freedom from agitation or excitement of mind; coolness in trying circumstances; indifference; calmness. --Burke. [1913 Webster]WordNet (r) 3.0 (2006):
sang-froid n 1: great coolness and composure under strain; "keep your cool" [syn: aplomb, assuredness, cool, poise, sang- froid]