frith-chaithmhéadracht

== Irish == === Etymology === From frithchaith (“reflect”, verb) +‎ -méadracht (“-metry”). === Noun === frith-chaithmhéadracht f (genitive singular frith-chaithmhéadrachta) (physics) reflectometry ==== Declension ==== === Mutation === === References === tearma.ie - Dictionary of Irish Terms - Foclóir Téarmaíochta