- likely to cause damage or injury; harmful; noxious.
Origin of nocuous
1625–35; < Latin nocuus harmful, injurious, equivalent to noc(ēre) to harm + -uus deverbal adj. suffix; see -ous
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- rare harmful; noxious
C17: from Latin nocuus, from nocēre to hurt
Word Origin and History for nocuous
1630s, "noxious, harmful," from Latin nocuus "harmful," from stem of nocere "to hurt, injure, harm" (see innocuous).
Online Etymology Dictionary, © 2010 Douglas Harper