achtana-

== Irish == === Alternative forms === achtan- (before vowels) achtanai- (before slender consonants) === Etymology === From Ancient Greek ἀκτῑ́ς (aktī́s, “ray, beam”). === Prefix === achtana- (physics) actino- ==== Derived terms ==== achtanasón m (“actinozoon”) === Mutation === === Further reading === Ó Dónaill, Niall (1977), “achtan(a)(i)-”, in Foclóir Gaeilge–Béarla [Irish–English Dictionary], Dublin: An Gúm, →ISBN