a medicinal paste that consists of drugs mixed with treacle, sugar, or honey and is administered orally, esp in veterinary medicine
For the rheumatism … take equal quantities of flour of sulphur, and flour of mustard-seed, make them an electuary with honey or treacle; and take a bolus as big as a nutmeg several times a day — Dr Johnson
[Middle English electuarie via Latin from Greek ekleikton, from ekleichein to lick up, from ex out + leichein to lick]