The Collaborative International Dictionary of English v.0.48:

Calambac \Cal"am*bac\ (k[a^]l"[a^]m*b[a^]k), n. [F. calambac,
   calambour, from Malay Kalambaq a king of fragrant wood.]
   (Bot.)
   A fragrant wood; agalloch.
   [1913 Webster]