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Webster 1913 Edition

Adj.

[From

: cf. AS.

þrītigōða

Next in order after the twenty-ninth; the tenth after the twentieth; – the ordinal of thirty;

as, the

thirtieth

day of the month

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.

Adj.

thur'tieth. [from thirty.] The tenth threefold; the ordinal of thirty; as the thirtieth day of the month.