| veil | 1. Something hung up, or spread out, to intercept the view, and hide an object; a cover; a curtain; especially, a screen, usually of gauze, crape, or similar diaphnous material, to hide or protect the face. "The veil of the temple was rent in twain." (Matt. Xxvii. 51) "She, as a veil down to the slender waist, Her unadorned golden tresses wore." (Milton) 2. A cover; disguise; a mask; a pretense. "[I will] pluck the borrowed veil of modesty from the so seeming Mistress Page." (Shak) 3. <botany> The calyptra of mosses. A membrane connecting the margin of the pileus of a mushroom with the stalk; called also velum. 4. A covering for a person or thing; as, a nun's veil; a paten veil; an altar veil. 5. <zoology> Same as Velum. To take the veil, to receive or be covered with, a veil, as a nun, in token of retirement from the world; to become a nun. Origin: OE. Veile, OF. Veile, F. Voile, L. Velum a sail, covering, curtain, veil, probably fr. Vehere to bear, carry, and thus originally, that which bears the ship on. See Vehicle, and cf. Reveal Alternative forms: vail. Source: Websters Dictionary (01 Mar 1998) |
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| veil cell | An antigen-presenting cell that has veil-like cytoplasmic processes and circulates in the blood and lymph. Synonym: veiled cells. (05 Mar 2000) |
| veiled cell | A cell type found in afferent lymph and defined (rather unsatisfactorily) on the basis of its morphology. Probably an accessory cell migrating from the periphery (where it is referred to as a Langerhans cell if in the skin) to the draining lymph node. In the lymph node known as an interdigitating cell and found in the T dependent areas of spleen or lymph nodes, involved in antigen presentation (Class II MHC positive). Has high levels of surface Ia antigens. (18 Nov 1997) |
| veiled cells | An antigen-presenting cell that has veil-like cytoplasmic processes and circulates in the blood and lymph. Synonym: veiled cells. (05 Mar 2000) |
| veiling glare | Glare resulting from excessive illumination. Synonym: veiling glare. (05 Mar 2000) |
| veillonella | A genus of gram-negative, anaerobic cocci parasitic in the mouth and in the intestinal and respiratory tracts of man and other animals. (12 Dec 1998) |
| Veillonella alcalescens alcalescens | A subspecies found primarily in the mouth of humans but occasionally in the buccal cavity of rabbits and rats; it is the type subspecies of the species Veillonella alcalescens. (05 Mar 2000) |
| Veillonella alcalescens criceti | A subspecies found in the mouth of hamsters. (05 Mar 2000) |
| Veillonella alcalescens dispar | A subspecies found in the mouth and respiratory tract of humans. (05 Mar 2000) |
| Veillonella alcalescens ratti | A subspecies found in the mouth and intestinal contents of rats. (05 Mar 2000) |
| Veillonella alcalesens | A species found in the saliva of humans and other animals. (05 Mar 2000) |
| Veillonella atypica | A subspecies found in the buccal cavity of rats and humans. Synonym: Veillonella atypica. (05 Mar 2000) |
| Veillonella parvula | A species found normally as a harmless parasite in the natural cavities, especially the mouth and digestive tract, of humans and other animals; it is the types species of the genus Veillonella. (05 Mar 2000) |
| Veillonella parvula atypica | A subspecies found in the buccal cavity of rats and humans. Synonym: Veillonella atypica. (05 Mar 2000) |
| Veillonella parvula parvula | A subspecies found in the mouth or the intestinal or respiratory tract of humans; it is the type subspecies of the species Veillonella parvula. (05 Mar 2000) |
| aqueduct veil | A membrane obstructing the sylvian aqueduct, causing a noncommunicating hydrocephalus. (05 Mar 2000) |
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| Sattler's veil | A diffuse oedema of the corneal epithelium that may develop after wearing contact lenses. (05 Mar 2000) |
| Jackson's veil | A thin vascular membrane or veil-like adhesion, covering the anterior surface of the ascending colon from the caecum to the right flexure; it may cause obstruction by kinking of the bowel. Synonym: Jackson's veil. (05 Mar 2000) |