| random amplification of polymorphic DNA | <molecular biology> A term originally invented by polymer chemists to describe a disordered tangle of a linear polymer chain with curved sections. In DNA parlance the random coil refers to the structure that results from melting or other forms of separation of the double helix, i.e. Helix coil transition. (18 Nov 1997) |
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| random amplified polymorphic DNA technique | Technique that utilises low-stringency polymerase chain reaction (pcr) amplification with single primers of arbitrary sequence to generate strain-specific arrays of anonymous DNA fragments. Rapd technique may be used to determine taxonomic identity, assess kinship relationships, analyze mixed genome samples, and create specific probes. (12 Dec 1998) |
| polymorphic | <biology> Occurring in several or many forms, appearing in different forms at different stages of development. Origin: Gr. Morph = form (18 Nov 1997) |
| polymorphic epithelial mucin | <protein> See episialin. (18 Nov 1997) |
| polymorphic genetic markers | Inherited characteristics that occur within a given population as two or more traits. (05 Mar 2000) |
| polymorphic leaves | Two or more different types of leaves on plants, in wetland plants, polymorphic leaves may develop due to extended flooding. (09 Oct 1997) |
| polymorphic neuron | Occurring in many shapes. See: multipolar cell. (05 Mar 2000) |
| polymorphic reticulosis | A necrotizing lymphoproliferative lesion with a predilection for the upper respiratory tract. Previously called lethal midline granuloma or malignant midline reticulosis. Treatment is irradiation. (05 Mar 2000) |
| polymorphic superficial keratitis | Epithelial degeneration occurring in starvation. (05 Mar 2000) |
| butterfly eruption | Origin: Perh. From the colour of a yellow species. AS. Buter-flege, buttor-fleoge; cf. G. Butterfliege, D. Botervlieg. See Butter, and Fly. <zoology> A general name for the numerous species of diurnal Lepidoptera. See: Illust. Under Aphrodite] Asclepias butterfly. See Asclepias. Butterfly fish, a kind of double clack valve, consisting of two semicircular clappers or wings hinged to a cross rib in the pump bucket. When open it somewhat resembles a butterfly in shape. Source: Websters Dictionary (01 Mar 1998) |
| passive eruption | The apparent continued eruption of the teeth, actually the result of regression of the gingivae and crestal bone. Polymorphous light eruption, a common pruritic papular eruption appearing in a few hours and lasting up to several days on skin exposed to shortwave ultraviolet light; subepidermal oedema and deep perivascular lymphocytic infiltration is seen microscopically. Eruption sequestrum, spicule of bone overlying the central occlusal fossa of an erupting permanent molar. Serum eruption, urticaria seen in serum sickness. Surgical eruption, the uncovering of an unerupted tooth to permit its further eruption into the oral cavity by surgically removing overlying soft tissue, bone, and sometimes teeth. (05 Mar 2000) |
| medicinal eruption | drug eruption |
| volcanic eruption | The ash, dust, gases, and lava released by volcanic explosion. The gases are volatile matter composed principally of about 90% water vapor, and carbon dioxide, sulfur dioxide, hydrogen, carbon monoxide, and nitrogen. The ash or dust is pyroclastic ejecta and lava is molten extrusive material consisting mainly of magnesium silicate. (12 Dec 1998) |
| clinical eruption | Development of the crown of a tooth that can be observed clinically. Continuous eruption, the eruption of a tooth into the mouth and its continuous movement in a vertical direction. (05 Mar 2000) |
| creeping eruption | <dermatology, microbiology> Also called creeping eruption. This condition results from infection of the human skin by the larvae of the dog and cat hookworm, A. Brasiliense. The result is a red, raised, tunnel on the surface of the skin. Severe itching is common. Beaches and other moist sandy areas are common locations for infection. Thiabendazole is the drug of choice. (13 Nov 1997) |