(Ir*ru"bric*al) a. Contrary to the rubric; not rubrical.
(Ir"ru*gate) v. t. [L. irrugatus, p. p. of irrugare to wrinkle.] To wrinkle. [Obs.]
(Ir*rupt"ed) a. [L. irruptus, p. p. of irrumpere to break in; pref. ir- in + rumpere to break or
burst. See Rupture.] Broken with violence.
(Ir*rup"tion) n. [L. irruptio: cf. F. irruption. See Irrupted.]
1. A bursting in; a sudden, violent rushing into a place; as, irruptions of the sea.
Lest evil tidings, with too rude irruptionMilton.
Hitting thy aged ear, should pierce too deep.
2. A sudden and violent inroad, or entrance of invaders; as, the irruptions of the Goths into Italy. Addison.
Syn. Invasion; incursion; inroad. See Invasion.
(Ir*rup"tive) a. Rushing in or upon.
(Ir"ving*ite) n. (Eccl.) The common designation of one a sect founded by the Rev. Edward
Irving who call themselves the Catholic Apostolic Church. They are highly ritualistic in worship, have an
elaborate hierarchy of apostles, prophets, etc., and look for the speedy coming of Christ.
(Is-) See Iso-.
(Is) v. i. [AS. is; akin to G. & Goth. ist, L. est, Gr. Skr. asti. &radic9. Cf. Am, Entity, Essence,
Absent.] The third person singular of the substantive verb be, in the indicative mood, present tense; as,
he is; he is a man. See Be.
In some varieties of the Northern dialect of Old English, is was used for all persons of the singular.
For thy is I come, and eke Alain.Chaucer.
Aye is thou merry.Chaucer.
The idiom of using the present for future events sure to happen is a relic of Old English in which the
present and future had the same form; as, this year Christmas is on Friday.
To-morrow is the new moon.1 Sam. xx. 5.
(Is"a*bel) n., Is"a*bel col"or [F. isabelle.] See Isabella.
(Is`a*bel"la) n., Is`a*bel"la col"or . [Said to be named from the Spanish princess Isabella, daughter
of king Philip II., in allusion to the color assumed by her shift, which she wore without change from 1601
to 1604, in consequence of a vow made by her.] A brownish yellow color.
(Is`a*bel"la grape`) (Bot.) A favorite sweet American grape of a purple color. See Fox
grape, under Fox.
(Is`a*bel"la moth`) (Zoöl.) A common American moth of an isabella color. The larva, called
woolly bear and hedgehog caterpillar, is densely covered with hairs, which are black at each end of the
body, and red in the middle part.
(Is`a*bel"line) a. Of an isabel or isabella color.
(Is*ag"e*lous) a. [Is- + Gr. a`gelos information.] Containing the same information; as, isagelous
sentences. "The coded message and the original, though appearing entirely unlike, are completely isagelous."