A termination consisting of the suffix -ous with a preceding original or euphonic vowel i. It formerly alternated with -eous. See -eous and -ous.(noun)
The Century Dictionary (Public Domain)
Use "ious" in a sentence
"Moving on from books, Chris at qwghlm reports that the UK Daily Mail has discovered del. ic.ious."
"One of Chris's examples of a Daily Mail del. ic.ious top tag is a story about how flip-flops can damage your health."
"Namibian authorities found a suspic ious package at an airport as workers loaded luggage on a flight to Germany."