tu|fa

tu|fa «TOO fuh, TYOO-», noun.

1. any one of various porous rocks formed of powdery matter consolidated and often stratified, especially a form of limestone deposited by springs.

2. = tuff. (Cf. ↑tuff)

╂[< Italian tufo < Latin tōfus. See etym. of doublet tuff. (Cf. ↑tuff)]