The Collaborative International Dictionary of English v.0.48:
Innoxious \In*nox"ious\, a. [L. innoxius. See In- not, and Noxious.] 1. Free from hurtful qualities or effects; harmless; innocuous. "Innoxious flames." --Sir K. Digby. [1913 Webster] 2. Free from crime; pure; innocent. --Pope. -- In*nox`ious*ly, adv. -- In*nox"ious*ness, n. [1913 Webster]WordNet (r) 3.0 (2006):
innoxious adj 1: having no adverse effect