Dīng Dù 丁度 (990–1053), zì Gōngyǎ 公雅, posthumously Wénjiǎn 文簡, was a Northern Sòng official and lexicographer. Jìnshì of Dàzhōngxiángfú 4 (1011); rose to Shǐjì shǎojiàn and Hànlín shìzhì. Major works: principal compiler of the Jí yùn 集韻 (the major Sòng rhyme-dictionary, completed 1037); co-compiler of the Wǔ jīng zǒng yào 武經總要 (KR3b0012). Biography: Sòng shǐ j. 292.