The Collaborative International Dictionary
Nocuous \Noc"u*ous\, a. [L. nocuus, fr. nocere to hurt.] Hurtful; noxious. [R.] -- Noc"u*ous*ly, adv. [R.]
Douglas Harper's Etymology Dictionary
1630s, "noxious, harmful," from Latin nocuus "harmful," from stem of nocere "to hurt, injure, harm" (see innocuous).
a. Likely to cause harm or damage
Usage examples of "nocuous".
Hassem had most likely purchased blossoms that were cut or plucked improperly, and therefore had lost some of their nocuous powers.