The Collaborative International Dictionary
Marmorosis
Marmorosis \Mar`mo*ro"sis\ (m[aum]r`m[-o]*r[=o]"s[i^]s), n.
[NL.] (Geol.)
The metamorphism of limestone, that is, its conversion into
marble.
--Geikie.
Wiktionary
marmorosis
n. (context geology English) The metamorphosis of limestone into marble.