(n.) A kind of curve; one of the conic sections formed by the intersection of the surface of a cone with a plane parallel to one of its sides. It is a curve, any point of which is equally distant from a fixed point, called the focus, and a fixed straight line, called the directrix. See Focus.
(n.) One of a group of curves defined by the equation y = axn where n is a positive whole number or a positive fraction. For the cubical parabola n = 3; for the semicubical parabola n = /. See under Cubical, and Semicubical. The parabolas have infinite branches, but no rectilineal asymptotes.
Example Sentences:
(1) The major variation in these patterns can be modeled by families of parabolas with a single degree of freedom.
(2) The relation between concentration and absorption in an eight step calibration series is well described by a parabola of the 2nd degree.
(3) It was shown that the women used a parabola with a larger margin over the top of the hurdle than the men: A lower parabola would shorten the hurdle step, and would require the lengthening of the three interhurdle steps.
(4) Three to eight parabolas were averaged for subjects in each posture; the mean for each posture was calculated.
(5) It was found that the velocity profile of the FITC labelled RBC in straight microvessels was blunt as compared to a parabola.
(6) The "excitability ratio" is the first derivative of the response parabola and as such becomes a linear function of the actual arterial CO2 partial pressure.
(7) The equation of the resulting parabola, corresponding to the upper frontal arch, can be applied to every maxillary dimension.
(8) This increase is satisfactorily expressed by a cubic parabola.
(9) A not previously described relationship between HbA2 and total Hb was demonstrated and probably conformed to a second degree parabola.
(10) The shape of protrusive condyle path was like a section of parabola curved forward and downward.
(11) Evaluations of the arterial and venous bleeding were conducted at 3 rates x 3 parabolas, and capillary bleeding was evaluated with 5 parabolas x 2 methods (pig's foot and sponge).
(12) The flow velocity profile in the venule seems to deviate slightly from the Newtonian parabola.
(13) The concentration of factor VIIIa can be obtained from the quadratic coefficient of the equation describing the parabola.
(14) Pointing accuracy improved movement-to-movement but not parabola-to-parabola, indicating that prolonged exposure is needed for sustained adaptation.
(15) A "reference parabola" is introduced making the fluid pressure concept more understandable.
(16) Transcranial Doppler data with accompanying acceleration information were analyzed in three segments in each parabola.
(17) The following objectives are addressed in this study: 1) to discuss present techniques and two new radiographic measurement systems; 2) to establish mean, standard deviation, and normal range values for these measurement systems; 3) to determine if these measurements vary with foot size; and 4) to use the results to establish general guidelines for metatarsal parabola reconstruction.
(18) Reaction patterns of 90 cortical neurons to acetylcholine approximated by two parabolas have been divided on simple and complex.
(19) Each parabola included a period of 1.8 Gz, then approximately 20 seconds of weightlessness, and finally a period of 1.6 Gz; the cycle repeated almost immediately for the remainder of the set.
(20) The constant delta C model is explored and a physically more realistic model is advanced which allows for a temperature-dependent delta C which changes sign at some temperature within the range of stability of the native protein; delta G(T) then has the form of a skewed parabola.
Plane
Definition:
(n.) Any tree of the genus Platanus.
(a.) Without elevations or depressions; even; level; flat; lying in, or constituting, a plane; as, a plane surface.
(a.) A surface, real or imaginary, in which, if any two points are taken, the straight line which joins them lies wholly in that surface; or a surface, any section of which by a like surface is a straight line; a surface without curvature.
(a.) An ideal surface, conceived as coinciding with, or containing, some designated astronomical line, circle, or other curve; as, the plane of an orbit; the plane of the ecliptic, or of the equator.
(a.) A block or plate having a perfectly flat surface, used as a standard of flatness; a surface plate.
(a.) A tool for smoothing boards or other surfaces of wood, for forming moldings, etc. It consists of a smooth-soled stock, usually of wood, from the under side or face of which projects slightly the steel cutting edge of a chisel, called the iron, which inclines backward, with an apperture in front for the escape of shavings; as, the jack plane; the smoothing plane; the molding plane, etc.
(a.) To make smooth; to level; to pare off the inequalities of the surface of, as of a board or other piece of wood, by the use of a plane; as, to plane a plank.
(a.) To efface or remove.
(a.) Figuratively, to make plain or smooth.
Example Sentences:
(1) "This is the third event in the last few days following An-26 and SU-25 planes being brought down.
(2) The Ta loop was a smooth, elongated ellipse in configuration and showed clockwise rotation in all planes, as did the P loop.
(3) Typically the iron-iron axis (gz) of the binuclear iron-sulfur clusters is in the membrane plane.
(4) (4) Despite the removal of the cruciate ligaments and capsulo-ligamentous slide, no significant residual instability was found in either plane.
(5) "I was eight in 1983, but I remember a plane that flew low over our Bulawayo suburb and army loud-hailers screaming: 'You are surrounded.'
(6) Deviations in two planes simultaneously cause less error than deviation in one plane.
(7) Other fusiform cells of the cPVN are oriented in a rostral-caudal plane and are situated more medially in this subdivision.
(8) We set a new basic plane on an orthopantomogram in order to measure the gonial angle and obtained the following: 1) Usable error difference in ordinary clinical setting ranged from 0.5 degrees-1.0 degree.
(9) All the wounded Britons have been repatriated , including four severely injured people who were brought back by an RAF C-17 transport plane.
(10) The relapse was 80% in the sagittal plane, 70% in the transverse plane, and 12% in the vertical plane.
(11) They operate on a mystical and symbolic plane, which is foreign to the practice of "Western" medicine.
(12) A technique is therefore described using 3-D images and reconstruction of high-resolution films, which allows rapid examination of the menisci in optimal planes.
(13) The technique of two-plane angiography of femoro-popliteal bypasses with 90 degrees knee flexion is described.
(14) Right ventricular volumes were determined in 12 patients with different levels of right and left ventricular function by magnetic resonance imaging (MRI) using an ECG gated multisection technique in planes perpendicular to the diastolic position of the interventricular septum.
(15) This provides a direct display, in the viewing plane, of the slice profile.
(16) The resistance is a complex function of the perfusion pressure and the cross-sectional area of the stenosis and cannot be accurately predicted from a single plane angiographic image.
(17) After 1 month, scaling and root planing had effected significant clinical improvement and significant shifts in the subgingival flora to a pattern more consistent with periodontal health; these changes were still evident at 3 months.
(18) Subsequently, due to the rotation of the original polar axis in one hemisphere, the third cleavage plane through one half of the egg is transverse to the third cleavage plane through the other half.
(19) Manchester United 3-1 Barcelona | match report Read more While, according to Louis van Gaal , Rojo was not on the flight because of an issue with his travel documents, the manager was unsure why Di María had failed to board the plane.
(20) The lower neck flexion is 35 degrees and extension of the plane of the face 15 degrees, each angle measured relative to horizontal.