| centric occlusion | The relation of opposing occlusal surfaces which provides the maximum planned contact and/or intercuspation, the occlusion of the teeth when the mandible is in centric relation to the maxillae. Synonym: centric contact. (05 Mar 2000) |
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| centric position | The position of the mandible in its most retruded unstrained relation to the maxillae. See: centric jaw relation. (05 Mar 2000) |
| centric relation | The location of the maxillary and the mandibular condyles when they are in their most posterior and superior positions in their fossae of the temporomandibular joint. (12 Dec 1998) |
| centriciput | The central portion of the upper surface of the skull, between the occiput and the sinciput. Origin: L. Centrum, centre, + caput, head (05 Mar 2000) |
| centrifugal | 1. Denoting the direction of the force pulling an object outward (away) from an axis of rotation. 2. Sometimes, by analogy, extended to describe any movement away from a centre. Compare: eccentric. Origin: L. Centrum, centre, + fugio, to flee (05 Mar 2000) |
| centrifugal casting | Casting molten metal into a mold by spinning the metal from a crucible at the end of a revolving arm. (05 Mar 2000) |
| centrifugal current | The direction of current flow in a nerve when the cathode is placed peripheral to the anode, in contrast to ascending current. Synonym: centrifugal current. (05 Mar 2000) |
| centrifugal fast analyzer | An automatic spectrophotometer that uses centrifugal force to mix samples and reagents, and propels the reactants at high speed about a detector that makes multiple absorbance readings. (05 Mar 2000) |
| centrifugal force | <physics> The apparent force which seems to pull an object outward when the object is spun around in a circle. In reality, it is the centripetal force which keeps the object rotating around in the circle when the object's inertia makes the object inclined to move in a straight tangential line away from the circle. The centrifugal force does not really exist and, in a strictly physical sense, the term is a misnomer. However, the term is useful to biologists and chemists who are using centrifuges. (13 Nov 1997) |
| centrifugal nerve | <anatomy, nerve> A nerve which transmits impulses from the brain and spinal cord to a muscle or organ. (27 Sep 1997) |
| centrifugalise | A laboratory apparatus that separates mixed samples into homogenouscomponent layers by spinning them at high speed. (09 Oct 1997) |
| centrifugalization | <procedure> The process of separating fractions of systems in a centrifuge. The most basic separation is to sediment a pellet at the bottom of the tube, leaving a supernatant at a given centrifugal force. In this case sedimentation is determined by size and density of the particles in the system amongst other factors. Density may be used as a basis for sedimentation in density gradient centrifugation. at very high g values molecules may be separated, i.e. Ultracentrifugation. In continuous centrifugation the supernatant is removed continuously as it is formed. (13 Nov 1997) |
| centrifugation | <procedure> The process of separating fractions of systems in a centrifuge. The most basic separation is to sediment a pellet at the bottom of the tube, leaving a supernatant at a given centrifugal force. In this case sedimentation is determined by size and density of the particles in the system amongst other factors. Density may be used as a basis for sedimentation in density gradient centrifugation. at very high g values molecules may be separated, i.e. Ultracentrifugation. In continuous centrifugation the supernatant is removed continuously as it is formed. (13 Nov 1997) |
| centrifugation, density gradient | Separation of particles according to density by employing a gradient of varying densities. at equilibrium each particle settles in the gradient at a point equal to its density. (12 Dec 1998) |
| centrifugation, isopycnic | Centrifugation in which the solvent is of the same density as the substance to be isolated. From the greek iso-, equal and pyknos, thick. (12 Dec 1998) |
| centrifugal force |
The influence on a rotating or orbiting body that directs it away from the center pivot point.
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| central limit theorem |
A theorem telling us that when the sample size n is sufficiently large, then the population of all possible sample means is approximately normally distributed no matter what probability distribution describes the sampled population. (page 238)
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| centripetal acceleration |
Acceleration directed toward the center pivot point.
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| centrifugal force |
The apparent force in a rotating system, deflecting masses radially outward from the axis of rotation, with magnitude per unit mass 2 R, where is the angular speed of rotation and R is the radius of curvature of the path. This magnitude may also be written as V 2 /R, in terms of the linear speed V. This force (per unit mass) is equal and opposite to the centripetal acceleration. ...
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| centripetal acceleration |
The acceleration on a particle moving in a curved path, directed toward the instantaneous center of curvature of the path, with magnitude V 2 /R, where V is the speed of the particle and R the radius of curvature of the path. This acceleration is equal and opposite to the centrifugal force per unit mass.
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| centr | large grouse of sagebrush regions of North America |
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| centr | point representing the mean position of the matter in a body |
| centr | of or relating to (especially passing through) a centroid |
| centr | a genus of Centrolobium |
| centr | Brazilian tree with handsomely marked wood |
| centr | a specialized condensed region of each chromosome that appears during mitosis where the chromatids are held together to form an X shape |
| centr | pertaining to the dense specialized portion of a chromosome to which the spindle attaches during mitosis |
| centr | bluish black-striped sea bass of the Atlantic coast of the United States |
| centr | a family of fish or the order Perciformes including robolos |
| centr | type genus of the Centropomidae: snooks |
| centr | sea basses |
| centr | a kind of sea bass |