Irrigate, ir′i-gāt, v.t. to water: to wet or moisten: to cause water to flow upon.—adj. Irr′igable, capable of being irrigated.—ns. Irrigā′tion, a method of producing or increasing fertility in soils by an artificial supply of water, or by inundating them at stated periods: act of watering, esp. of watering lands artificially; Irrigat′or, one who, or that which, irrigates: an appliance for washing a wound, &c.—adj. Irrig′uous, watered: wet. [L. irrigāre, -ātum—in, upon, rigāre, to wet; cf. Ger. regen, Eng. rain.]
Irrision, ir-rizh′un, n. act of laughing at another. [Fr.,—L. irrision-em—in, against, ridēre, risum, to laugh.]
Irritate, ir′i-tāt, v.t. to make angry: to provoke: to excite heat and redness in: (Scots law) to render null and void.—n. Irritabil′ity, the quality of being easily irritated: the peculiar susceptibility to stimuli possessed by the living tissues.—adj. Irr′itable, that may be irritated: easily provoked: (med.) susceptible of excitement or irritation.—n. Irr′itableness.—adv. Irr′itably.—n. Irr′itancy, the state of being irritant: a becoming null and void.—adj. Irr′itant, irritating.—n. that which causes irritation.—n. Irritā′tion, act of irritating or exciting: excitement: (med.) the term applied to any morbid excitement of the vital actions not amounting to inflammation, often, but not always, leading to that condition.—adjs. Irr′itātive, Irr′itātory, tending to irritate or excite: accompanied with or caused by irritation. [L. irritāre, -ātum, prob. freq. of irrīre, to snarl, as a dog.]
Irruption, ir-rup′shun, n. a breaking or bursting in: a sudden invasion or incursion.—adjs. Irrup′ted, broken through with violence; Irrup′tive, rushing suddenly in or upon.—adv. Irrup′tively. [Fr.,—L. irruption-em—in, in, rumpĕre, ruptum, to break.]
Irvingite, ėr′ving-īt, n. a popular name for a member of the so-called Catholic Apostolic Church.—n. Ir′vingism, the doctrine and practice of the Irvingites. [From Edward Irving (1792-1834).]
Is, iz, third pers. sing. pres. of be. [A.S. is; Ger. ist, L. est, Gr. esti, Sans. asti—as, to be.]
Isabel, Isabelle, iz′a-bel, n. a yellowish-gray or drab colour. [From Isabella, daughter of Philip II., wife of the Archduke Albert, who did not change her linen for three years till Ostend was taken.]
Isagogics, ī-sa-goj′iks, n. that part of theological science introductory to exegesis or interpretation of the Scriptures.—adj. Isagog′ic. [Gr. eisagōgē, an introduction—eis, into, agein, to lead.]
Isandrous, ī-san′drus, adj. (bot.) having the stamens similar and equal in number to the divisions of the corolla.
Isantherous, ī-san′ther-us, adj. (bot.) having the anthers equal.