The Collaborative International Dictionary of English v.0.48:
germicide \ger"mi*cide\ (j[~e]r"m[i^]*s[imac]d), n. A germicidal agent. -- a. Germicidal. [1913 Webster]WordNet (r) 3.0 (2006):
germicide n 1: an agent (as heat or radiation or a chemical) that destroys microorganisms that might carry disease [syn: disinfectant, germicide, antimicrobic, antimicrobial]