| corona capitis | The topmost part of the head. Synonym: crown of head. (05 Mar 2000) |
|---|
| corona | A ring of tissue arising from the corolla or perianth of a flower and standing between the perianth lobes and the stamens. (09 Oct 1997) |
|---|---|
| corona ciliaris | The circular figure on the inner surface of the ciliary body, formed by the processes and folds (plicae) taken together. Synonym: ciliary crown, ciliary wreath. (05 Mar 2000) |
| corona clinica | That part of the crown of a tooth visible in the oral cavity. Synonym: corona clinica. (05 Mar 2000) |
| corona dentis | The portion of a tooth covered with enamel. Synonym: corona dentis, anatomical crown. (05 Mar 2000) |
| corona glandis | The prominent posterior border of the glans penis. Synonym: corona glandis. (05 Mar 2000) |
| corona of glans penis | The prominent posterior border of the glans penis. Synonym: corona glandis. (05 Mar 2000) |
| corona radiata | A fan-shaped fibre mass on the white matter of the cerebral cortex, composed of the widely radiating fibres of the internal capsule; a single layer of columnar cells derived from the cumulus oophorus, which anchor on the pellucid zone of the oocyte in a secondary follicle. Synonym: radiate crown. (05 Mar 2000) |
| corona seborrheica | A red band at the hair line along the upper border of the forehead and temples occasionally observed in seborrheic dermatitis of the scalp. (05 Mar 2000) |
| corona veneris | Papular syphilitic lesions (secondary eruption) along the anterior margin of the scalp or on the back of the neck. See: crown of Venus. (05 Mar 2000) |
| Zinn's corona | <anatomy, nerve> A network of branches of the short ciliary arteries on the sclera around the point of entrance of the optic nerve. Synonym: circulus vasculosus nervi optici, circulus arteriosus halleri, circulus zinnii, Haller's circle, Zinn's corona, Zinn's vascular circle. (05 Mar 2000) |
| zona corona | An irregularly disposed collection of visible veins seen in the skin of people usually of or past middle age; it has no specific connection with any deep structure, such as the diaphragm, and no necessary connection with underlying visceral disease. Synonym: zona corona. (05 Mar 2000) |
| acrosomal cap | A collapsed membranous vesicle that covers the anterior part of the nucleus of the spermatozoon, derived from the acrosomal granule; the carbohydrate-rich substance of the cap is associated with hydrolytic enzymes that aid in sperm penetration of the zona pellucida of the ovum. Synonym: head cap. (05 Mar 2000) |
| apical cap | <radiology> Local pleural thickening at lung apex, ascribed incorrectly to TB, aetiology: non-specific fibrous scarring (most common), Pancoast tumour (12 Dec 1998) |
| bishop's cap | <botany> A plant of the genus Mitella; miterwort. Source: Websters Dictionary (01 Mar 1998) |
| cap | <abbreviation> Catabolite (gene) activator protein. 1. Any anatomical structure that resembles a cap or cover. 2. A protective covering for an incomplete tooth. 3. Colloquialism for restoration of the coronal part of a natural tooth by means of an artificial crown. 4. The nucleotide structure found at the 5' terminus of many eukaryotic messenger RNAs, consisting of a 7-methylguanosine connected, via its 5'-hydroxyl group, by a triphosphate group to the 5'-hydroxyl group of the first nucleoside encoded by the DNA; usually symbolised as m7G5'ppp5'N, where N is nucleoside number 1 in the transcribed mRNA and is often itself methylated; the cap is added posttranscriptionally. (05 Mar 2000) |