قَيْحٌ

Thick purulent matter (مِدَّةٌ) unmixed with blood; (S, A, L, K;) white, thick [matter], unmixed with blood: (Msb:) or, as some say, [contr. to the generality of the lexicographers,] thin matter (صَدِيد) like water, in which is a شُكْلَة [ or small admixture, or tinge of the red and white hue,] of blood. (L.)