12-letter words containing y, a, u
- younger edda — either of two old Icelandic literary works, one a collection of poems on mythical and religious subjects (or) erroneously attributed to Saemund Sigfusson (c1055–1133), the other a collection of ancient Scandinavian myths and legends, rules and theories of versification, poems, etc. (or) compiled and written in part by Snorri Sturluson (1179–1241).
- younger hand — (in piquet and similar card games) the dealer
- younghusband — Sir Francis Edward. 1863–1942, British explorer, mainly of N India and Tibet. He used military force to compel the Dalai Lama to sign (1904) a trade agreement with Britain
- your-majesty — regal, lofty, or stately dignity; imposing character; grandeur: majesty of bearing; the majesty of Chartres.
- youth leader — a person who has responsibility for the young people at a youth club etc
- yuan shi kai — 1859–1916, Chinese general and statesman: first president (1912–16) of the Chinese republic
- yukawa meson — a hypothetical elementary particle with finite rest mass, whose exchange between nucleons would account for the strong short-range forces between nucleons: subsequently identified as the pion.
- yuri gagarin — Yuri Alekseyevich [yoo r-ee al-ik-sey-uh-vich;; Russian yoo-ryi uh-lyi-ksye-yi-vyich] /ˈyʊər i ˌæl ɪkˈseɪ ə vɪtʃ;; Russian ˈyu ryɪ ʌ lyɪˈksyɛ yɪ vyɪtʃ/ (Show IPA), 1934–68, Russian astronaut: first human being to make an orbital space flight (1961).