THIRTIETH
thirtieth, th
(adjective) coming next after the twenty-ninth in position
thirtieth
(noun) position 30 in a countable series of things
Source: WordNet® 3.1
Adjective
thirtieth (not comparable)
The ordinal form of the number thirty.
Synonyms
• (abbreviations): 30th, 30th
• (obsolete): trigesimal
Noun
thirtieth (plural thirtieths)
The person or thing in the thirtieth position.
One of thirty equal parts of a whole.
Source: Wiktionary
Thir"ti*eth, a. Etym: [From Thirty: cf. AS. Ăľritigoedha.]
1. Next in order after the twenty-ninth; the tenth after the
twentieth; -- the ordinal of thirty; as, the thirtieth day of the
month.
2. Constituting or being one of thirty equal parts into which
anything is divided.
Thir"ti*eth, n.
Definition: The quotient of a unit divided by thirty; one of thirty equal
parts.
Source: Webster’s Unabridged Dictionary 1913 Edition