| export | <cell biology> To transport substances from inside the cell, through the cell membrane, to the outside by a system specialised for the purpose. To secrete. (09 Oct 1997) |
|---|---|
| expose | To perform or undergo exposure. Origin: O. Fr. Exposer, fr. L. Ex-pono, pp. Ex-positum, to set out, expose (05 Mar 2000) |
| exposed pulp | Pulp that has been exposed or laid bare by a pathologic process, trauma, or a dental instrument. (05 Mar 2000) |
| exposure | <radiobiology> A quantitative measure of x or gamma radiation at a certain place, based on its ability to produce ionisation in air. The former special unit of exposure was the roentgen (R). 1R = 2.58 x 10-4 C/kg. In the international system (SI unit), the special unit is coulomb per kilogram. (Exposure also is frequently used as a synonym for irradiation). (16 Dec 1997) |
| exposure dose | The radiation dose, expressed in roentgens, delivered at a point in free air. Synonym: air dose. (05 Mar 2000) |
| exposure keratitis | Inflammation of the cornea resulting from irritation caused by inability to close the eyelids. Synonym: lagophthalmic keratitis. (05 Mar 2000) |
| exposure odds ratio | <epidemiology> See Odds ratio. (05 Dec 1998) |
| express | 1. To press or squeeze out; as, to express the juice of grapes, or of apples; hence, to extort; to elicit. "All the fruits out of which drink is expressed." (Bacon) "And th'idle breath all utterly expressed." (Spenser) "Halters and racks can not express from thee More than by deeds." (B. Jonson) 2. To make or offer a representation of; to show by a copy or likeness; to represent; to resemble. "Each skillful artist shall express thy form." (E. Smith) "So kids and whelps their sires and dams express." (Dryden) 3. To give a true impression of; to represent and make known; to manifest plainly; to show in general; to exhibit, as an opinion or feeling, by a look, gesture, and especially. By language; to declare; to utter; to tell. "My words express my purpose." (Shak) "They expressed in their lives those excellent doctrines of morality." (Addison) 4. To make known the opinions or feelings of; to declare what is in the mind of; to show (one's self); to cause to appear; used reflexively. "Mr. Phillips did express with much indignation against me, one evening." (Pope) 5. To denote; to designate. "Moses and Aaron took these men, which are expressed by their names." (Num. I. 17) 6. To send by express messenger; to forward by special opportunity, or through the medium of an express; as, to express a package." Synonym: To declare, utter, signify, testify, intimate. Origin: Cf. OF. Espresser, expresser, L. Exprimere, expressum. See Express,; cf. Sprain. Source: Websters Dictionary (01 Mar 1998) |
| expressed emotion | Frequency and quality of negative emotions, e.g., anger or hostility, expressed by family members or significant others, that often lead to a high relapse rate, especially in schizophrenic patients. (12 Dec 1998) |
| expressed gene | <molecular biology> The full use of the information in a gene via transcription and translation leading to production of a protein and hence the appearance of the phenotype determined by that gene. Gene expression is assumed to be controlled at various points in the sequence leading to protein synthesis and this control is thought to be the major determinant of cellular differentiation in eukaryotes. (18 Nov 1997) |
| expressed mustard oil | The fixed oil expressed from the seeds of Brassica alba and B. Nigra; it contains the glycerides of oleic, arachidic, and other fatty acids; used as salad oil and in the manufacture of oleomargarine. (05 Mar 2000) |
| Expressed Sequence Tag | <molecular biology> Expressed sequence tags are sequence tagged sites derived from cDNAs. See: sequence tagged site. Acronym: EST (06 Aug 1998) |
| expressed skull fracture | A fracture with outward displacement of a part of the cranium. (05 Mar 2000) |
| expression | <molecular biology> The process by which a gene's coded information is converted into the structures present and operating in the cell. Expressed genes include those that are transcribed into mRNA and then translated into protein and those that are transcribed into RNA but not translated into protein (for example, transfer and ribosomal RNAs). (06 Aug 1998) |
| expression cloning | <molecular biology> A vector that results in the expression of inserted DNA sequences when propagated in a suitable host cell, i.e. The protein coded for by the DNA is synthesised by the host's system. (06 Aug 1998) |