Webster’s Revised Unabridged Dictionary · 1913
Pus
Pus (pŭs), n. [L., akin to Gr. πύος, πύον, and to E. foul: cf. F. pus. See Foul, a.] (Med.) The yellowish white opaque creamy matter produced by the process of suppuration. It consists of innumerable white nucleated cells floating in a clear liquid.