esteriad

== Welsh == === Etymology === From esteru (“to esterify”) +‎ -iad. === Pronunciation === IPA(key): /ɛsˈdɛrjad/, [ɛsˈtɛrjat] === Noun === esteriad m (plural esteriadau) (organic chemistry) esterification === Mutation === === Further reading === Delyth Prys; J.P.M. Jones; Owain Davies; Gruffudd Prys (2006), Y Termiadur: termau wedi'u safoni; standardised terminology‎[1] (in Welsh), Cardiff: Awdurdod cymwysterau, cwricwlwm ac asesu Cymru (Qualifications curriculum & assessment authority for Wales), →ISBN