thirtieth
UK /ˈθɜːti.əθ/ · US /ˈθɝti.əθ/ adjective, noun
Forms thirtieths
- adjective The ordinal form of the number thirty.
- noun The person or thing in the thirtieth position.
- noun One of thirty equal parts of a whole.
Synonyms
Etymology
From earlier thirteth, from Middle English thrittithe, threttiþe, thrittyde, from Old English þrītigoþa; equivalent to thirty + -eth. For the modern form, see the etymological notes at twentieth.
Webster’s 1913
- adjective Next in order after the twenty-ninth; the tenth after the twentieth; --the ordinal of thirty; as, the thirtieth day of the month.
- adjective Constituting or being one of thirty equal parts into which anything is divided.
- noun The quotient of a unit divided by thirty; one of thirty equal parts.
Etymology [From Thirty: cf. AS. þritigoedha.]
Sources: Wiktionary · Webster’s 1913 — from the Wiktionary entry “thirtieth”, CC BY-SA 4.0. Details