n.
Pronunciation: ' t ə r-sh ē - ˌ er- ē , -sh ə -r ē
Function: noun
Inflected Form: plural -ries
Date: circa 1550
1 [Medieval Latin tertiarius, from Latin, of a third] : a member of a monastic third order especially of lay people
2 capitalized : the Tertiary period or system of rocks