triantánúil

== Irish == === Etymology === From triantán (“triangle”) +‎ -úil (adjectival suffix). === Adjective === triantánúil (genitive singular masculine triantánúil, genitive singular feminine triantánúla, plural triantánúla, comparative triantánúla) trigonometric, trigonometrical ==== Declension ==== ==== Related terms ==== triantánacht (“trigonometry”) === Mutation === === Further reading === Ó Dónaill, Niall (1977), “triantánúil”, in Foclóir Gaeilge–Béarla, Dublin: An Gúm, →ISBN