petrography
noun
pe·trog·ra·phy pə-ˈträ-grə-fē 
pe-
: the description and systematic classification of rocks
petrographer
pə-ˈträ-grə-fər
noun pe-
petrographic
ˌpe-trə-ˈgra-fik
adjective or petrographical
ˌpe-trə-ˈgra-fi-kəl
petrographically
ˌpe-trə-ˈgra-fi-k(ə-)lē
adverb 
Word History
Etymology
petro- + -graphy
First Known Use
1651, in the meaning defined above
- unmalleabilities
- unmalleabilityes
- unmalleabilitys
- unmalleable
- unmalted
- unman
- unmanacle
- unmanacled
- unmanacles
- unmanacling
- unmanageabilities
- unmanageability
- unmanageable
- unmanageablenesses
- unmanageably
- unmanaged
- unmanful
- unmanfully
- unmanifest
- unmanifested
- unmanipulated
- unmanlier
- unmanliest
- unmanlike
- unmanliness