alcoholometer|ˌælkəhɒˈlɒmɪtə(r)| [f. alcohol + -ometer. Cf.Fr.alcoolomètre.] An instrument for measuring the proportion of absolute alcohol in a liquor. 1859in Worcester.1875Ure Dict. Arts I. 59 Sykes's hydrometer, or alcoholometer, is the one employed by the Board of Excise.