| discission | 1. Incision or cutting through a part. 2. In ophthalmology, opening of the capsule and breaking up of the cortex of the lens with a needle knife or laser. Origin: L. Di-scindo, pp. -scissus, to tear asunder (05 Mar 2000) |
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| discitis | Inflammation of an intervertebral disk or disk space which may lead to disk erosion. Until recently, discitis has been defined as a nonbacterial inflammation and has been attributed to aseptic processes (e.g., chemical reaction to an injected substance). However, recent studies provide evidence that infection may be the initial cause, but perhaps not the promoter, of most cases of discitis. Discitis has been diagnosed in patients following discography, myelography, lumbar puncture, paravertebral injection, and obstetrical epidural anaesthesia. Discitis following chemonucleolysis (especially with chymopapain) is attributed to chemical reaction by some and to introduction of microorganisms by others. (12 Dec 1998) |
| disclosing solution | A solution that selectively stains all soft debris, pellicle, and bacterial plaque on teeth; used as an aid in identifying bacterial plaque after rinsing with water. (05 Mar 2000) |
| disclosure | 1. The act of disclosing, uncovering, or revealing; bringing to light; exposure. "He feels it [his secret] beating at his heart, rising to his throat, and demanding disclosure." (D. Webster) 2. That which is disclosed or revealed. "Were the disclosures of 1695 forgotten?" (Macaulay) See: Disclose, and cf. Closure. Source: Websters Dictionary (01 Mar 1998) |
| disco- | Disc- A disk; disk-shaped. Origin: G. Diskos (05 Mar 2000) |
| discoblastic | <biology> Applied to a form of egg cleavage seen in osseous fishes, which occurs only in a small disk that separates from the rest of the egg. Origin: Gr. Disk + to grow. Source: Websters Dictionary (01 Mar 1998) |
| discoblastula | A blastula of the type produced by the meroblastic discoidal cleavage of a large-yolked ovum. (05 Mar 2000) |
| discodactyl | <zoology> One of the tree frogs. See: Discodactylia. Source: Websters Dictionary (01 Mar 1998) |
| discodactylia | <zoology> A division of amphibians having suctorial disks on the toes, as the tree frogs. Origin: NL, fr. Gr. Disk + finger. Source: Websters Dictionary (01 Mar 1998) |
| discodactylous | <zoology> Having sucking disks on the toes, as the tree frogs. Source: Websters Dictionary (01 Mar 1998) |
| discogastrula | A gastrula of the type formed after the discoidal cleavage of a large-yolked ovum. (05 Mar 2000) |
| discogenic | Denoting a disorder originating in or from an intervertebral disk. Origin: disco-+ G. Genesis, origin (05 Mar 2000) |
| discoid | Shaped like a disk. Origin: Gr. Diskos = disk (18 Nov 1997) |
| discoid lupus erythematosus | A form of lupus erythematosus in which cutaneous lesions are present; these commonly appear on the face and are atrophic plaques with erythema, hyperkeratosis, follicular plugging, and telangiectasia; in some instances systemic lupus erythematosis may develop. Synonym: chronic discoid lupus erythematosus. (05 Mar 2000) |
| discoidal cleavage | Meroblastic cleavage limited to the small cap (animal pole) of protoplasm of large-yolked eggs, such as the telolecithal eggs of birds. (05 Mar 2000) |