| rubber dam | In surgery, thin strips of rubber used as a surgical drain or barrier, a thin sheet of rubber with holes that is placed over teeth to isolate them from the oral cavity. (05 Mar 2000) |
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| rubber dam clamp | A springlike metal piece encircling or grasping the cervix of a tooth and so shaped as to prevent a rubber dam from coming off the tooth. (05 Mar 2000) |
| rubber dam clamp forceps | A forceps with pronged jaws designed to engage the jaws of a rubber dam clamp so that they may be separated to pass over the widest buccolingual contour of a tooth. Synonym: rubber dam clamp forceps. (05 Mar 2000) |
| punch | To perforate or stamp with an instrument by pressure, or a blow; as, to punch a hole; to punch ticket. Punching machine, or Punching press, a machine tool for punching holes in metal or other material; called also punch press. Origin: From Punch, a tool; cf. F. Poinconner. A beverage composed of wine or distilled liquor, water (or milk), sugar, and the juice of lemon, with spice or mint; specifically named from the kind of spirit used; as rum punch, claret punch, champagne punch, etc. Milk punch, a sort of punch made with spirit, milk, sugar, spice, etc. Punch bowl, a large bowl in which punch is made, or from which it is served. Roman punch, a punch frozen and served as an ice. Origin: Hind. Panch five, Skr. Pacan. So called because composed of five ingredients, viz, sugar, arrack, spice, water, and lemon juice. See Five. Source: Websters Dictionary (01 Mar 1998) |
| punch biopsy | A punch is an instrument for cutting and removing a disk of tissue. A punch biopsy of the skin may for example be done to make the diagnosis of a malignancy. (12 Dec 1998) |
| punch card | A card on which data are stored by means of holes made in specified positions so that data can be sorted, processed, and analyzed. (05 Mar 2000) |
| punch grafts | Small full-thickness graft's of the scalp, removed with a circular punch and transplanted to a bald area to grow hair. (05 Mar 2000) |
| dam | 1. A female parent; used of beasts, especially of quadrupeds; sometimes applied in contempt to a human mother. "Our sire and dam, now confined to horses, are a relic of this age (13th century) . . . .Dame is used of a hen; we now make a great difference between dame and dam." (T. L. K. Oliphant) "The dam runs lowing up end down, Looking the way her harmless young one went." (Shak) 2. A kind or crowned piece in the game of draughts. Origin: OE. Dame mistress, lady; also, mother, dam. See Dame. 1. A barrier to prevent the flow of a liquid; especially, a bank of earth, or wall of any kind, as of masonry or wood, built across a water course, to confine and keep back flowing water. 2. <chemistry> A firebrick wall, or a stone, which forms the front of the hearth of a blast furnace. Dam plate, an iron plate in front of the dam, to strengthen it. Origin: Akin to OLG, D, & Dan. Dam, G. & Sw. Damm, Icel. Dammr, and AS. Fordemman to stop up, Goth. Faordammjan. Source: Websters Dictionary (01 Mar 1998) |
| Dam, C P Henrik | <person>Danish biochemist and Nobel laureate, 1895-1976. See: Dam unit. (05 Mar 2000) |
| dam gene | <molecular biology> A gene that codes for the synthesis of a DNA adenine methylase. (09 Oct 1997) |
| dam methylase | <enzyme> An enzyme responsible for the methylation of adenine residues in specific sequences. Synonym: deoxyadenosine methylase. (05 Mar 2000) |
| Dam methyltransferase | <enzyme> From E coli; recognises gatc sequences in E coli k12 DNA and methylates adenosine; not part of the modification system; has been sequenced Registry number: EC 2.1.1.- Synonym: eco dam methylase, p1 dam methylase, t4 dam methylase, t2 dam methylase, dam methylase, dam gene protein, k-12 DNA adenine methylase (26 Jun 1999) |
| Dam unit | A unit of activity of vitamin K; the smallest amount of vitamin K, per gram of chick per day, capable of producing normal coagulability in the blood of K-avitaminotic chicks after 3 days of oral administration. (05 Mar 2000) |
| blue rubber-bleb nevi | A syndrome characterised by erectile, easily compressible, thin-walled haemangiomatous nodules, widely distributed in the skin and in the alimentary canal, and sometimes in other tissues; lesions in the gut may perforate or cause haemorrhage, and the patient may be anaemic from continual bleeding. (05 Mar 2000) |
| blue rubber bleb nevus syndrome | <radiology> Bean syndrome, sporadic (some autosomal dominant), rubbery, raised blue-black skin nevi (cavernous haemangiomata, 0.1 - 5 cm), GI mucosal haemangiomata, bowel: polypoid filling defects of varying sizes, visceral haemangiomata (by angio) associated with: leukaemia, medulloblastoma, hypernephroma, Mafucci syndrome More info: blue rubber bleb nevus syndrome (12 Dec 1998) |