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A substance added to paints and some medicines to promote drying; a drier.
[Late Latin siccātīvus, drying, from Latin siccātus, past participle of siccāre, to dry, from siccus, dry.]
(Elements & Compounds) a substance added to a liquid to promote drying: used in paints and some medicines
[C16: from Late Latin siccātīvus, from Latin siccāre to dry up, from siccus dry]