| Ir | <abbreviation> Infrared. Symbol for iridium. (05 Mar 2000) |
|---|---|
| Ir associated antigen | Antigens coded for by IR (immune response) genes or antigens coded for by the genome close to the IR genes. See: Ia antigens. (18 Nov 1997) |
| Ir gene | Immune response genes, located within the MHC of vertebrates. Originally recognised as controlling the level of immune response to various synthetic polypeptides, they are now also recognised as mapping within the regions controlling T-cell help and suppression (I region). (18 Nov 1997) |
| iranian | Of or pertaining to Iran. A native of Iran; also, the Iranian or Persian language, a division of the Aryan family of languages. Source: Websters Dictionary (01 Mar 1998) |
| irenics | That branch of Christian science which treats of the methods of securing unity among Christians or harmony and union among the churches. Synonym: Irenical theology. Source: Websters Dictionary (01 Mar 1998) |
| irestone | <chemical> Any very hard rock. Source: Websters Dictionary (01 Mar 1998) |
| IRI | <abbreviation> Immunoreactive insulin. (05 Mar 2000) |
| IRI/G ratio | The ratio of immunoreactive insulin to serum or plasma glucose; in hypoglycaemic states a ratio of less than 0.3 is usual with the exception of the hypoglycaemia due to insulinoma, where the ratio is often higher than 0.3. (05 Mar 2000) |
| irid- | See: irido-. (05 Mar 2000) |
| iridal | Relating to the iris. Synonym: iridial, iridian, iridic. (05 Mar 2000) |
| iridectomy | <surgery> The act or process of cutting out a portion of the iris in order to form an artificial pupil. Origin: Gr, iris + cutting out; out + to cut. Source: Websters Dictionary (01 Mar 1998) |
| iridencleisis | The incarceration of a portion of the iris by corneoscleral incision in glaucoma to effect filtration between the anterior chamber and subconjunctival space. Origin: irido-+ G. Enkleio, to shut in (05 Mar 2000) |
| irideous | <botany> Pertaining to, or resembling, a large natural order of endogenous plants (Iridaceae), which includes the genera Iris, Ixia, Crocus, Gladiolus, and many others. Origin: From NL. Iris, Iridis, the Iris. Source: Websters Dictionary (01 Mar 1998) |
| irideraemia | Condition wherein the iris is so rudimentary as to appear to be absent. Compare: aniridia. Origin: irido-+ G. Eraemia, absence (05 Mar 2000) |
| irides | Plural of iris. Origin: G. (05 Mar 2000) |