| irradiancy | 1. The act of irradiating; emission of rays of light. 2. That which irradiates or is irradiated; luster; splendor; irradiation; brilliancy. Origin: From Irradiant. Source: Websters Dictionary (01 Mar 1998) |
|---|---|
| irradiant | Irradiating or illuminating; as, the irradiant moon. Origin: L. Irradians, -antis, p. Pr. See Irradiate. Source: Websters Dictionary (01 Mar 1998) |
| irradiate | 1. To throw rays of light upon; to illuminate; to brighten; to adorn with luster. "Thy smile irradiates yon blue fields." (Sir W. Jones) 2. To enlighten intellectually; to illuminate; as, to irradiate the mind. 3. To animate by heat or light. 4. To radiate, shed, or diffuse. "A splendid faade, . . . Irradiating hospitality." (H. James) Origin: L. Irradiatus, p. P. Of irradiate. See In- in, and Radiate. To emit rays; to shine. Illuminated; irradiated. Origin: L. Irradiatus, p. P. Source: Websters Dictionary (01 Mar 1998) |
| irradiated vitamin D milk | Cow's milk exposed in a thin film to ultraviolet light and standardised to contain 400 USP units of vitamin D per quart. (05 Mar 2000) |
| irradiation | Treatment by ionising radiation, such as X-rays or radioactive sources such as radioactive iodine seeds. See: radiation therapy. (16 Dec 1997) |
| irrational | 1. Not rational; void of reason or understanding; as, brutes are irrational animals. 2. Not according to reason; absurd; foolish. "It seemed utterly irrational any longer to maintain it." (I. Taylor) 3. <mathematics> Not capable of being exactly expressed by an integral number, or by a vulgar fraction; surd; said especially of roots. See Surd. Synonym: Absurd, foolish, preposterous, unreasonable, senseless. See Absurd. Origin: L. Irrationalis: cf. F. Irrationnel. See In- not, and Rational. Source: Websters Dictionary (01 Mar 1998) |
| irrecordable | Not fit or possible to be recorded. Origin: Pref. Ir not + record: cf. L. Irrecordabilis not to be remembered. Source: Websters Dictionary (01 Mar 1998) |
| irreducible | 1. Incapable of being reduced, or brought into a different state; incapable of restoration to its proper or normal condition; as, an irreducible hernia. 2. <mathematics> Incapable of being reduced to a simpler form of expression; as, an irreducible formula. <mathematics> Irreducible case, a particular case in the solution of a cubic equation, in which the formula commonly employed contains an imaginary quantity, and therefore fails in its application. Irredu"cibleness, Irredu"cibly. Source: Websters Dictionary (01 Mar 1998) |
| irreducible hernia | A hernia that cannot be reduced without operation. Synonym: incarcerated hernia. (05 Mar 2000) |
| irrefromable | Incapable of being reformed; incorrigible. Source: Websters Dictionary (01 Mar 1998) |
| irregular | Not regular; not conforming to a law, method, or usage recognised as the general rule; not according to common form; not conformable to nature, to the rules of moral rectitude, or to established principles; not normal; unnatural; immethodical; unsymmetrical; erratic; no straight; not uniform; as, an irregular line; an irregular figure; an irregular verse; an irregular physician; an irregular proceeding; irregular motion; irregular conduct, etc. Cf. Regular. "Mazes intricate, Eccentric, intervolved, yet regular Then most when most irregular they seem." (Milton) "Leading the men of Herefordshire to fight Against the irregular and wild Glendower." (Shak) "A flowery meadow through which a clear stream murmured in many irregular meanders." (Jones) Synonym: Immethodical, unsystematic, abnormal, unnatural, anomalous, erratic, devious, crooked, eccentric, unsettled, uneven, variable, changeable, mutable, desultory, disorderly, wild, immoderate, intemperate, inordinate, vicious. Origin: Pref. Ir- not + regular: cf. F. Irregulier. Source: Websters Dictionary (01 Mar 1998) |
| irregular astigmatism | Astigmatism in which different parts of the same meridian have different degrees of curvature. (05 Mar 2000) |
| irregular bone | One of a group of bones having peculiar or complex forms, e.g., vertebrae, many of the skull bones. Synonym: os irregulare. (05 Mar 2000) |
| irregular dentin | Morphologically irregular dentin formed in response to an irritant. Synonym: irregular dentin, irritation dentin, reparative dentin. (05 Mar 2000) |
| irregular emphysema | Emphysema that shows no consistent relationship to any portion of the acinus; always associated with fibrosis. (05 Mar 2000) |