trochydd gyddfgoch

== Welsh == === Alternative forms === trochydd gwddfgoch === Etymology === trochydd (“diver, loon”) + gyddfgoch (“red-necked, red-throated”). === Noun === trochydd gyddfgoch f (plural trochyddion gyddfgoch) red-throated diver, red-throated loon (Gavia stellata) === Mutation === === References ===