Inflammation is a process by which the body's white blood cells and substances they produce protect us from infection with foreign organisms, such as bacteria and viruses.rthritis is a general term that describes inflammation in the joints. Some types of arthritis associated with inflammation include the following: 1  Rheumatoid arthritis.
irritant. adjective irritation, nuisance, annoyance, pain (informal), drag (informal), tease, pest, provocation, gall, goad, aggravation (informal), pain in the neck (informal), pain in the arse (taboo informal), thorn in your flesh He said the issue was not a major irritant.noun.rÂ·riÂ·tant. adj. Causing irritation, especially physical irritation. n. A source of irritation: tobacco smoke, a common eye irritant.
from The American HeritageÂ® Dictionary of the English Language, 4th Edition. 1  Working or spreading harmfully in a subtle or stealthy manner: insidious rumors; an insidious disease. 2  Intended to entrap; treacherous: insidious misinformation. 3  Beguiling but harmful; alluring: insidious pleasures.rom The American HeritageÂ® Dictionary of the English Language, 4th Edition. 1  Working or spreading harmfully in a subtle or stealthy manner: insidious rumors; an insidious disease. 2  Intended to entrap; treacherous: insidious misinformation. 3  Beguiling but harmful; alluring: insidious pleasures.