a musical instrument for identifying the strength of spirits, with a scale finished to be able to show the portion of pure liquor, either by weight or volume. It will always be a kind of hydrometer with a special scale.
(letter.) An instrument for deciding the potency of spirits, with a scale graduated in order to show the percentage of pure alcoholic beverages, either by fat or amount. It is almost always a type of hydrometer with an unique scale.