Thirtieth
Easton’s Bible Dictionary & Webster’s 1828 Dictionary · Matthew George Easton, Noah Webster
Thirtieth - (Webster's 1828 Dictionary)
THIRTIETH, a. thur'tieth. [from thirty.] The tenth threefold; the ordinal of thirty; as the thirtieth day of the month.
Source of the article
Matthew George Easton, Easton’s Bible Dictionary; Noah Webster, American Dictionary of the English Language (1828)
Bible Strong combined digital edition