— tufaceous /tooh fay"sheuhs, tyooh-/ , adj.
/tooh"feuh, tyooh"-/ , n. Geol.
1. Also called calcareous tufa, calc-tufa, calc-tuff . a porous limestone formed from calcium carbonate deposited by springs or the like. Cf. travertine .
2. (not in technical use) tuff 2 .
[ 1760-70; tufo tofus ]