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Collins: Lozenges are sweets which you can suck to make a cough or sore throat better.
Oxford: a small medicinal tablet, originally in the shape of a lozenge, taken for sore throats and dissolved in the mouth.
Cambridge: a small, flat sweet that you suck to make a cough or sore throat feel better.
Cambridge American Dictionary: a small, flavored candy, often containing medicine, which dissolves when sucked in the mouth

мед. льодяник (від кашлю, горла).