the Three Character Classic, a Classical Chinese text / a Japanese text in a similar metre, also known as the 本朝三字経 (honchō sanjikyō)

ditto mark (〃)

(anatomy) sigmoid colon

(typography) the iteration mark 〻, used to repeat kanji, historically mostly kanji with kun'yomi

Han character that is of 3 identical elements arranged in the style of the character 品

(typography) the iteration mark 々, used to repeat kanji

(typography) each mark of the pairs of iteration marks ゝ/ゞ and ヽ/ヾ, respectively used to repeat 清音 (seion)/濁音 (dakuon) hiragana and katakana

(typography) either of the iteration marks 〱 and 〲, respectively used to repeat more than one 清音 (seion) and 濁音 (dakuon) in vertical text, as well as their decomposed counterparts, 〳, 〴 and 〵

belladonna (a plant, Atropa belladonna)

(Japanese mythology) one of the first three gods who came into existence when heaven and earth began (天地開闢 (tenchi kaibyaku)), along with 天御中主 (Ama no Minakanushi) and 神皇産霊 (Kamimusuhi)