| mesmerism | The art of inducing an extraordinary or abnormal state of the nervous system, in which the actor claims to control the actions, and communicate directly with the mind, of the recipient. See Animal magnetism, under Magnetism. Origin: From Mesmer, who first brought it into notice at Vienna, about 1775: cf. F. Mesmerisme. Source: Websters Dictionary (01 Mar 1998) |
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| mesna | <chemical> 2-mercaptoethanesulfonic acid sodium salt. An inhalation expectorant that breaks disulfide bonds in the mucopolysaccharides of mucus. It is used to treat chronic bronchitis and other respiratory diseases. Coenzyme m (2-mercaptoethanesulfonic acid) is involved in the methanogenesis pathway. Pharmacological action: expectorants. Chemical name: Ethanesulfonic acid, 2-mercapto-, monosodium salt (12 Dec 1998) |
| meso compound | <chemistry> A compound that has two or more chiral centres but does not rotate plane-polarized light because it has an internal plane of symmetry. These compounds are identical to their mirror images. (09 Jan 1998) |
| meso compounds | Compounds containing more than one asymmetric carbon atom, with configurations about them so balanced that the molecule as a whole possesses a plane of symmetry, although the individual carbon atoms do not; such compounds are not optically active; e.g., ribitol, mucic acid, meso-inositol, meso-cystine. (05 Mar 2000) |
| meso- | Mes- 1. Middle, mean, intermediacy. 2. A mesentery, mesentery-like structure. 3. A prefix denoting a compound, containing more than one chiral centre, having an internal plane of symmetry; such compounds do not exhibit optical activity (e.g., meso-cystine). Origin: G. Mesos (05 Mar 2000) |
| meso-cystine | An isomer of cystine in which the configuration about one of the alpha-carbons is d, about the other, l, so that the molecule as a whole possesses a plane of symmetry and is optically inactive. Note that meso-cystine is not dl-cystine. Dl-cystine is a racaemic mixture of dd-cystine and ll-cystine. (05 Mar 2000) |
| meso-inositol | 1. Generic term for any isomer of meso-inositol in which the hydroxyl groups are so arranged that the molecule as a whole possesses a plane of symmetry and is optically inactive. 2. Former name for myo-inositol. (05 Mar 2000) |
| meso-ontomorph | A broad, stocky individual. Origin: meso-+ G. On, being, + morphe, form (05 Mar 2000) |
| meso-tartrate dehydrogenase | <enzyme> Forms dihydroxyfumarate; distinguished from EC 1.1.1.93 which forms oxaloglycollate Registry number: EC 1.3.1.7 (26 Jun 1999) |
| mesoappendix | The short mesentery of the appendix lying behind the terminal ileum, in which the appendicular artery courses. Synonym: mesenteriolum processus vermiformis, mesentery of appendix. (05 Mar 2000) |
| mesoarium | <anatomy> The fold of peritoneum which suspends the ovary from the dorsal wall of the body cavity. Origin: NL, from Gr. Middle +, dim. Of an egg. Source: Websters Dictionary (01 Mar 1998) |
| mesobilane | A reduced mesobilirubin with no double bonds between the pyrrole rings and, consequently, colourless. See: bilirubinoids. Synonym: mesobilirubinogen, urobilinogen IXa. (05 Mar 2000) |
| mesobilene | Mesobilene- A bilirubinoid. See: urobilin. Synonym: urobilin IX-a. (05 Mar 2000) |
| mesobilirubin | A compound differing from bilirubin only in that the vinyl groups of bilirubin are reduced to ethyl groups. See: bilirubinoids. (05 Mar 2000) |
| mesobilirubinogen | A reduced mesobilirubin with no double bonds between the pyrrole rings and, consequently, colourless. See: bilirubinoids. Synonym: mesobilirubinogen, urobilinogen IXa. (05 Mar 2000) |