Something that causes irritation and annoyance

Usage examples of irritant.

We may therefore conclude that the initial power of an irritant on the apex of the radicle of the bean, is less than that of geotropism when acting at right angles, but greater than that of geotropism when acting obliquely on it.

It was tear gas and smoke-bomb material, and the mixture had the irritant action on eyes and respiratory tract that could be confused with the deadly dichlorethyl sulphide, or mustard gas.

It was all she could manage with her lungs burning from exertion and skunk gas and her elbows and knees itching as badly as her ears from the irritant darts, but she knew better than to scratch at them because that only spread the allergens, and meanwhile she had to bite her lip hard and dig her nails into her palms to stop herself from scratching.

Vicia faba, circumnutation of radicle, 29, 30 --, of epicotyl, 3133 --, curvature of hypocotyl, 92 --, sensitiveness of apex of radicle, 132134 --, of the tips of secondary radicles, 154 --, of the primary radicle above the apex, 155158 --, various experiments, 135143 --, summary of results, 143151 --, power of an irritant on, compared with that of geotropism, 151154 Vicia faba, circumnutation of leaves, 233235 --, circumnutation of terminal leaflet, 235 --, effect of apogeotropism, 444 --, effect of amputating the tips of radicles, 523 --, regeneration of tips, 526 --, short exposure to geotropic action, 527 --, effects of amputating the tips obliquely, 528 --, of cauterising the tips, 529 --, of grease on the tips, 534 Vines, Mr.

When we speak of modified circumnutation we mean that light, or the alternations of light and darkness, gravitation, slight pressure or other irritants, and certain innate or constitutional states of the plant, do not directly cause the movement.

Fargo brandished his investigator's credentials, an additional irritant to Scortius, who'd been forced to muck around the countryside trying to find the lost shipment of furs "alleged" to have been stashed somewhere near Jennings.

One of the aglets at the end of his shoelace contained a highly compressed irritant agent, primarily Chloroacetophenone-a mild but smoky form of tear gas.

Robert Bronsky's report on the composition of cigarette smoke-the more than four thousand compounds, the sixteen known carcinogens, the fourteen alkalis, the irritants, and all that other stuff.

This husk acted as an irritant to the alimentary canal, without adding any nutriment to the bread.

It is distilled from the seeds that have been deprived of most of the fixed oil and macerated in water for several hours, and contains from go to 99 per cent of the active principle, Allyl isothiocyanate, which is used as a counter irritant.

Just as they took no notice of attempts to contact or in any way interact with them, other than to flick off irritants as a man might brush off a biting fly, they proceeded to drastically alter the planetary ecosystems.

Its only justifiable use is as an anodyne counter irritant, especially for neuralgia.

His manner provided Killashandra with a fine counter irritant to her shock over Carrik's condition.

There must be some counter irritant, something which would get the Hoka back to the careless energy and childlike enthusiasm which served them so well….

I guess it - the emulsion -had acted very much in the same way as a few drops of croton oil would have done had it been made into an emulsion - as an irritant poison.