a. [ From Thirty: cf. AS. þrītigōða. ] 1. Next in order after the twenty-ninth; the tenth after the twentieth; -- the ordinal of thirty; as, the thirtieth day of the month. [ 1913 Webster ]
2. Constituting or being one of thirty equal parts into which anything is divided. [ 1913 Webster ]
[引, yǐn, ㄧㄣˇ]to draw (a bow); to pull; to stretch sth; to extend; to lengthen; to involve in; to attract; to lead; to guide; to divert (water); unit of distance equal to 10 丈[ zhang1 ], now one-thirtieth km or 33.33 meters#3188[Add to Longdo]