What is the meaning of Tufa?

Calcareous lime deposited by precipitation from a body of water, such as a hot spring.

A variety of volcanic rock, tuff.

inflection of tufë:

1. definite nominative singular
2. indefinite nominative/accusative plural

definite nominative singular

indefinite nominative/accusative plural

a kind of helmet crest or plume

a kind of military standard

the sky

ceiling

to strip (something)

Source: wiktionary.org