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 mondofacto - Online Medical Dictionary
Category: Health and Medicine > Medical Dictionary
Date & country: 26/01/2008, UK
Words: 116197


basal surface
The surface of the denture of which the detail is determined by the impression and which rests upon the basal seat. ... (05 Mar 2000) ...

basal tuberculosis
Tuberculosis of the basilar portions of the lungs. ... (05 Mar 2000) ...

basal vein of Rosenthal
A large vein passing caudally and dorsally along the medial surface of the temporal lobe from which it receives tributaries; it empties into the great cerebral vein (of Galen) from the lateral side. ... Synonym: vena basalis, Rosenthal's vein. ... (05 Mar 2000) ...

basal veins
See: basal vein of Rosenthal, common basal vein, inferior basal vein, superior basal vein. ... (05 Mar 2000) ...

basalioma
<tumour> Obsolete term for basal cell carcinoma. ... (05 Mar 2000) ...

basalis
Synonym: basal. ... Origin: L. ... (05 Mar 2000) ...

basaloid
Resembling that which is basal, but not necessarily basal in origin or position. ... (05 Mar 2000) ...

basaloid carcinoma
<tumour> A poorly differentiated squamous cell carcinoma of the anus that has some microscopic resemblance to basal cell carcinoma of the skin, but which frequently metastasizes. ... (05 Mar 2000) ...

basaloid cell
A cell, usually of the epidermis, resembling a basal cell. ... (05 Mar 2000) ...

basaloma
<tumour> Obsolete term for basal cell carcinoma. ... (05 Mar 2000) ...

basalt
1. <geology> A rock of igneous origin, consisting of augite and triclinic feldspar, with grains of magnetic or titanic iron, and also bottle-green particles of olivine frequently disseminated. ... It is usually of a greenish black colour, or of some dull brown shade, or black. It constitutes immense beds in some regions, and also occurs in vei …

Basan
Marianne, 20th century German physician. ... See: Basan's syndrome. ... (05 Mar 2000) ...

Basan's syndrome
<syndrome> Ectodermal dysplasia with hypotrichosis, hypohidrosis, defective teeth, and unusual dermatoglyphics. ... (05 Mar 2000) ...

basanite
<chemical> Lydian stone, or black jasper, a variety of siliceous or flinty slate, of a grayish or bluish black colour. It is employed to test the purity of gold, the amount of alloy being indicated by the colour left on the stone when rubbed by the metal. ... Origin: L. Basanites lapis, Gr. The touchstone: cf. F. Basanite. ... Source: Websters …

base
<chemistry> The nonacid part of a salt, a substance that combines with acids to form salts, a substance that dissociates to give hydroxide ions in aqueous solutions, a substance whose molecule or ion can combine with a proton (hydrogen ion), a substance capable of donating a pair of electrons (to an acid) for the formation of a coordinate cov …

base analogue
<biochemistry> A chemical which resembles a nucleotide base. They can substitute the Purine and pyrimidine bases that normally appear in DNA, despite minor differences in structure. May be used for inducing mutations, including point mutations. ... For example: 5 bromouracil can replace thymine or 2 aminopurine replace adenine. ... (13 Nov 1997 …

base composition
<biochemistry> In reference to nucleic acid, the proportion of the total bases consisting of guanine plus cytosine or thymine plus adenine base pairs. ... Usually expressed as a guanine + cytosine (G+C) value, for example 60% G+C. ... (09 Oct 1997) ...

base deficit
A decrease in the total concentration of blood buffer base, indicative of metabolic acidosis or compensated respiratory alkalosis. ... (05 Mar 2000) ...

base dissociation constant
<chemistry> This is the equilibrium constant for the reaction in which a weak base breaks apart in water to form its conjugate acid and hydroxide ion. ... (09 Oct 1997) ...

base excess
A measure of metabolic alkalosis, usually predicted from the Siggaard-Andersen nomogram; the amount of strong acid that would have to be added per unit volume of whole blood to titrate it to pH 7.4 while at 37°C and at a carbon dioxide pressure of 40 mm Hg. ... (05 Mar 2000) ...

base in DNA
A unit of the DNA. There are 4 bases: adenine (A), guanine (G), thymine (T), and cytosine (C). The sequence of bases (for example, CAG) is the genetic code. ... (12 Dec 1998) ...

base material
Any substance from which a denture base may be made, such as shellac, acrylic resin, vulcanite, polystyrene, metal, etc. ... (05 Mar 2000) ...

base metal
A metal that is readily oxidised; e.g., iron, copper. ... (05 Mar 2000) ...

base microscopical
<microscopy> The microscope's supporting structure such as the horseshoe type. Heavier bases, some containing the entire illuminating system, began to appear after World War II. ... (05 Aug 1998) ...

base of arytenoid cartilage
The part of the arytenoid cartilage that articulates with the cricoid cartilage and from which the muscular process extends laterally and the vocal process projects anteriorly. ... Synonym: basis cartilaginis arytenoideae. ... (05 Mar 2000) ...

base of bladder
Synonym for fundus of urinary bladder ... The fundus is formed by the posterior wall which is somewhat convex. ... Synonym: fundus vesicae urinariae, bas-fond, base of bladder. ... (05 Mar 2000) ...

base of brain
The inferior surface of the brain visible when seen from below. ... Synonym: facies inferior cerebri, basis cerebri, inferior cerebral surface. ... (05 Mar 2000) ...

base of cochlea
The enlarged part of the cochlea that is directed posteriorly and medially and lies close to the internal acoustic meatus. ... Synonym: basis cochleae. ... (05 Mar 2000) ...

base of heart
That part of the heart that lies opposite the apex, formed mainly by the left atrium but to a small extent by the posterior part of the right atrium; it is directed backward and to the right and is separated from the vertebral column by the oesophagus and aorta. ... Synonym: basis cordis. ... (05 Mar 2000) ...

base of hyoid bone
Synonym for body of hyoid bone ... The body of the hyoid bone, from which the greater and lesser horns extend. ... Synonym: corpus ossis hyoidei, base of hyoid bone, basihyal, basihyoid. ... (05 Mar 2000) ...

base of lung
The lower concave part of the lung that rests upon the convexity of the diaphragm. ... Synonym: basis pulmonis. ... (05 Mar 2000) ...

base of mandible
The rounded inferior border of the body of the mandible. ... Synonym: basis mandibulae. ... (05 Mar 2000) ...

base of metacarpal bone
The expanded proximal extremity of each metacarpal that articulates with one or more of the distal row of carpal bones. ... Synonym: basis ossis metacarpalis. ... (05 Mar 2000) ...

base of metatarsal bone
The expanded proximal extremity of each metatarsal bone; it articulates with one or more of the distal row of tarsal bones. ... Synonym: basis ossis metatarsalis. ... (05 Mar 2000) ...

base of modiolus
The part of the modiolus enclosed by the basal turn of the cochlea; it faces the lateral end of the internal acoustic meatus. ... See: cochlear area. ... Synonym: basis modioli. ... (05 Mar 2000) ...

base of patella
The superior border of the patella to which the tendon of the rectus femoris attaches. ... Synonym: basis patellae. ... (05 Mar 2000) ...

base of phalanx
The expanded proximal end of each phalanx in the hand or foot that articulates with the head of the next proximal bone in the digit. ... Synonym: basis phalangis. ... (05 Mar 2000) ...

base of prostate
The broad upper surface of the prostate contiguous with the bladder wall. ... Synonym: basis prostatae. ... (05 Mar 2000) ...

base of renal pyramid
The outer broad part of a renal pyramid that lies next to the cortex. ... Synonym: basis pyramidis renis. ... (05 Mar 2000) ...

base of sacrum
The upper end of the sacrum that articulates with the body of the fifth lumbar vertebra in the midline and the alae on either side. ... Synonym: basis ossis sacri. ... (05 Mar 2000) ...

base of skull
The sloping floor of the cranial cavity. It comprises both the external base of skull (external view) and the internal base of skull (internal view). ... See: internal base of skull. ... Synonym: basis cranii, cranial base. ... (05 Mar 2000) ...

base of stapes
The flat portion of the stapes that fits in the oval window. ... Synonym: basis stapedis, footplate, foot-plate. ... (05 Mar 2000) ...

base of tongue
Synonym for root of tongue ... The posterior attached portion of the tongue. ... Synonym: radix linguae, base of tongue. ... (05 Mar 2000) ...

base pair
<molecular biology> Two nitrogenous bases (adenine and thymine or guanine and cytosine) held together by weak bonds. ... Two strands of DNA are held together in the shape of a double helix by the bonds between base pairs. ... (09 Oct 1997) ...

base pairing
<molecular biology> The specific hydrogen bonding between purines and pyrimidines in double stranded nucleic acids. ... In DNA the pairs are adenine and thymine and guanine and cytosine, while in RNA they are adenine and uracil and guanine and cytosine. ... Base pairing leads to the formation of a DNA double helix from two complementary single …

base projection
Synonym for axial projection ... Radiographic projection devised to obtain direct visualization of the base of the skull. ... Synonym: axial view, base projection, submental vertex projection, submentovertical projection, verticosubmental view. ... (05 Mar 2000) ...

base sequence
<molecular biology> The order of nucleotide bases in a DNA molecule. ... (09 Oct 1997) ...

base sequence analysis
<molecular biology> A method, sometimes automated, for determining the base sequence. ... (09 Oct 1997) ...

base substitution
<molecular biology> One nucleotide base is replaced by another in a DNA molecule. This is also called a point mutation. ... (09 Oct 1997) ...

base units
The fundamental unit's of length, mass, time, electric current, thermodynamic temperature, amount of substance, and luminous intensity in the International System of Units (SI); the names and symbols of the unit's for these quantities are meter (m), kilogram (kg), second (s), ampere (A), kelvin (K), mole (mol), and candela (cd). ... See: Internation …

base view
Synonym for submentovertex radiograph ... A radiographic projection showing the base of the skull, positions of the mandibular condyles, and zygomatic arches. ... Synonym: base view, submental vertex radiograph. ... (05 Mar 2000) ...

base-stacking
A clustering of DNA or RNA bases in which the rings lie on top of each other. ... (05 Mar 2000) ...

baseball
A competitive nine-member team sport including softball. ... (12 Dec 1998) ...

baseball coil
<radiobiology> Used in magnetic-mirror geometries to produce a minimum-B configuration, so-called because of their resemblance to the characteristic shape of stitches on a baseball. ... (09 Oct 1997) ...

baseball elbow
An epicondylitis of the medial epicondyle at the origin of the flexor muscles of the forearm; related to throwing and usually seen in children or adolescents. ... (05 Mar 2000) ...

baseball finger
An avulsion, partial or complete, of the long finger extensor from the base of the distal phalanx. ... Synonym: drop finger, hammer finger, mallet finger. ... (05 Mar 2000) ...

basedoid
Rarely used term denoting a condition resembling Graves' disease (Basedow's disease), but without toxic symptoms. ... (05 Mar 2000) ...

Basedow, Karl von
<person> German physician, 1799-1854. ... See: Basedow's disease, Basedow's pseudoparaplegia, Jod-Basedow phenomenon, Basedow's goiter. ... (05 Mar 2000) ...

Basedow's disease
<endocrinology> A common cause of hyperthyroidism thought to be caused by an underlying autoimmune mechanism. ... (27 Sep 1997) ...

Basedow's goiter
Colloid goiter which becomes hyperfunctional after the ingestion of excess iodine, the Jod-Basedow phenomenon. ... (05 Mar 2000) ...

Basedow's pseudoparaplegia
Weakness of the thigh muscles in thyrotoxicosis; may occur suddenly and cause the patient to fall. ... (05 Mar 2000) ...

basedowian
Rarely used to denote terms described by or attributed to K. Basedow. ... (05 Mar 2000) ...

baseline
<anatomy> A line approximating the base of the skull, passing from the infraorbital ridge to the midline of the occiput, intersecting the superior margin of the external auditory meatus; the skull is in the anatomical position when the base line lies in the horizontal plane. ... Synonym: orbitomeatal line. ... (08 Mar 2000) ...

baseline foetal heart rate
<paediatrics> The average heart rate for a particular foetus during the diastolic phase of uterine contractions. ... (05 Mar 2000) ...

baseline test
<investigation> Test which measures an organs normal level of functioning. Used to determine if any changes in organ function occur following treatment. ... (16 Dec 1997) ...

baseline tonus
Intrauterine pressure between contractions during labour. ... (05 Mar 2000) ...

baseload capacity
The power output that generating equipment can continuously produce. ... (05 Dec 1998) ...

baseload demand
The minimum demand experienced by an electric utility, usually 30-40% of the utility's peak demand. ... (05 Dec 1998) ...

basement
The outer wall of the ground story of a building, or of a part of that story, when treated as a distinct substructure. (See Base, 3) Hence: The rooms of a ground floor, collectively. ... <anatomy> Basement membrane, a delicate membrane composed of a single layer of flat cells, forming the substratum upon which, in many organs, the epithelioid …

basement lamina
Synonym for basement membrane ... <cell biology> Extracellular matrix characteristically found under epithelial cells. ... There are two distinct layers: the basal lamina, immediately adjacent to the cells, is a product of the epithelial cells themselves and contains collagen type IV and the reticular lamina is produced by fibroblasts of the un …

basement membrane
<cell biology> Extracellular matrix characteristically found under epithelial cells. ... There are two distinct layers: the basal lamina, immediately adjacent to the cells, is a product of the epithelial cells themselves and contains collagen type IV and the reticular lamina is produced by fibroblasts of the underlying connective tissue and co …

baseplate
<cell biology> A hypothetical cell adhesion molecule possibly involved in sponge cell adhesion, existence unproven. ... (18 Nov 1997) ...

baseplate wax
A hard pink wax used in dentistry for making occlusion rims. ... (05 Mar 2000) ...

Basham's mixture
Synonym for ferric and ammonium acetate solution ... A clear, aromatic, reddish-brown liquid which has been used in iron-deficiency anaemia in animals and man; a source of iron. ... Synonym: Basham's mixture. ... (05 Mar 2000) ...

bashkiria
A subdivision of russia, a plateau and mountainous area of the southern urals. It has extensive forests and valuable mineral deposits. ... (12 Dec 1998) ...

basi-
Base; basis. ... Origin: G. And L. Basis ... (05 Mar 2000) ...

basialis
Relating to a basis or the basion. ... (05 Mar 2000) ...

basialveolar
Relating to both basion and alveolar points; denoting especially the basialveolar length, or the shortest distance between these two points. ... (05 Mar 2000) ...

basibregmatic axis
A line extending from the basion to the bregma. ... (05 Mar 2000) ...

basic
1. <chemistry> Relating to a base; performing the office of a base in a salt. Having the base in excess, or the amount of the base atomically greater than that of the acid, or exceeding in proportion that of the related neutral salt. ... Apparently alkaline, as certain normal salts which exhibit alkaline reactions with test paper. ... 2. <ch …

basic amino acid
An amino acid containing a second basic group (usually an amino group); e.g., lysine, arginine, ornithine. ... Synonym: dibasic amino acid. ... (05 Mar 2000) ...

basic anhydride
<chemical> A chemical (usually the oxide of a metal) which forms a base when it is mixed with water. ... (09 Oct 1997) ...

basic diet
Synonym for alkaline-ash diet ... A diet consisting mainly of fruits, vegetables, and milk (with minimal amounts of meat, fish, eggs, cheese, and cereals), which, when catabolised, leave an alkaline residue to be excreted in the urine. ... Synonym: acid-ash diet, basic diet. ... (05 Mar 2000) ...

basic dyes
Dye's which ionise in solution to give positively charged ions or cations; the auxochrome group is an amine which can form a salt with an acid like HCl; solutions are usually slightly acidic; examples include basic fuchsin and toluidine blue O. ... (05 Mar 2000) ...

basic electrical rhythm
A slow wave of depolarisation of smooth muscle from the fundus to the pylorus that coordinates gastric peristalsis and emptying. ... (05 Mar 2000) ...

basic esotropia
Synonym for nonaccommodative esotropia ... That type of esotropia not influenced by correction of refractive error. ... Synonym: basic esotropia. ... (05 Mar 2000) ...

basic exotropia
Exotropia in which the strabismus is the same for near and far vision. ... (05 Mar 2000) ...

basic fuchsin
A triphenylmethane dye whose dominant component is pararosanilin; an important stain in histology, histochemistry, and bacteriology. ... Synonym: diamond fuchsin. ... (05 Mar 2000) ...

basic fuchsin-methylene blue stain
<technique> A stain for intact epoxy sections; semi-thick sections of plastic-embedded tissues have nuclei stained purple; collagen, elastic lamina, and connective tissue are stained blue; mitochondria, myelin, and lipid droplets are stained red; cytoplasm, smooth muscle cells, axoplasm, and chrondroblasts are stained pink. ... (05 Mar 2000)
basic life support
Emergency cardiopulmonary resuscitation, control of bleeding, treatment of shock, acidosis, and poisoning, stabilization of injuries and wounds, and basic first aid. ... (05 Mar 2000) ...

basic oxide
A base anhydride; an oxide of an electropositive element or radical; it can combine with water to form a base. ... (05 Mar 2000) ...

basic personality
See: basic personality type. ... (05 Mar 2000) ...

basic personality type
An individual's unique, covert, or underlying personality propensities, whether or not they are behaviourally manifest or overt, personality characteristics of an individual which are also shared by a majority of the members of a social group. ... (05 Mar 2000) ...

basic proteins
Proteins that are rich in basic amino acids; e.g., histones. ... (05 Mar 2000) ...

basic reaction
Synonym for alkaline reaction ... Any test by which an alkaline reaction is recognised, such as the change of red litmus paper to blue, an excess of hydroxide ions over hydrogen ions in aqueous solution as indicated by a pH value greater than 7 (at 22°C). ... Compare: dissociation constant of water. ... Synonym: basic reaction. ... (05 Mar 2000) ...

basic reproductive rate, ratio
<epidemiology> See Reproductive Ratio. ... (05 Dec 1998) ...

basic salt
A salt in which there are one or more hydroxyl ions not replaced by the electronegative element of an acid; e.g., Fe(OH)2Cl. ... (05 Mar 2000) ...

basic stain
<technique> A dye in which the cation is the coloured component of the dye molecule that binds to anionic groups of nucleic acids (PO4&equiv;) or acidic mucopolysaccharides (e.g., chondroitin sulfate). ... (05 Mar 2000) ...

basicranial
Relating to the base of the skull. ... (05 Mar 2000) ...

basicranial axis
A line drawn from the basion to the midpoint of the sphenoethmoidal suture. ... (05 Mar 2000) ...