قَيُوْءٌ

One (a man, IAar) who vomits much, or frequently; as also قَيُوٌّ; (IAar, K, TA;) the latter formed from the former, like مَقْرُوٌّ from مَقْرُوْءٌ. (L, TA.)

Also, [دَوَاءٌ قَيُوْءٌ,] Medicine that is taken to cause vomiting; (ISk, S, O;) and so ↓ دَوَاءٌ مُقَيِّيءٌ (K, TA) and ↓ مُقِىْءٌ. (TA.)