a. [ From Twenty; cf. AS. twentigoða. See Twenty. ] 1. Next in order after the nineteenth; tenth after the tenth; coming after nineteen others; -- the ordinal of twenty. [ 1913 Webster ]
2. Constituting, or being, one of twenty equal parts into which anything is divided. [ 1913 Webster ]
[宋史, Sòng shǐㄙㄨㄥˋ ㄕˇ] History of the Song dynasty, twentieth of the 24 dynastic histories 二十四史, composed under Toktoghan 脱脱 in 1345 during the Yuan 元 dynasty, 496 scrolls; (not to be confused with 宋書|宋书), See Also: 二十四史, 脱脱, 元, 宋書, 宋书#50991
[はつかしょうがつ, hatsukashougatsu] (n) twentieth day of the first month (end of New Year celebrations, upon which remaining New Year's food is eaten, decorations are stowed away, etc.)