horizontal plane

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Related to horizontal plane: median plane


1. a flat surface determined by the position of three points in space.
2. an imaginary flat surface that divides the body into sections (see accompanying figure). adj., adj pla´nar.
3. a specified level, as the plane of anesthesia.
4. to rub away or abrade; see also planing and plastic surgery.
5. a superficial incision in the wall of a cavity or between tissue layers, especially in plastic surgery, made so that the precise point of entry into the cavity or between the layers can be determined.
Planes of section. Transverse, sagittal, and frontal planes of the body. From Applegate, 2000.
coronal p's frontal p's.
datum plane a given horizontal plane from which craniometric measurements are made.
frontal p's those planes passing longitudinally through the body, an organ, or a part, at right angles to the median plane and dividing into front and back portions. Called also coronal planes.
horizontal plane transverse plane.
median plane one passing longitudinally through the body, an organ, or a part from front to back, dividing it into right and left halves.
sagittal p's vertical planes through the body parallel to the median plane or the sagittal suture, dividing the body into unequal left and right portions.
transverse plane one passing horizontally through the body, an organ, or a part at right angles to the median and frontal planes, dividing it into upper and lower portions. Called also horizontal plane.
vertical plane one perpendicular to a horizontal plane, such as a sagittal plane, median plane, or frontal plane.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.

horizontal plane

Transverse plane Imaging A directional plane that divides the body, organ, or appendage into superior and inferior or proximal and distal
McGraw-Hill Concise Dictionary of Modern Medicine. © 2002 by The McGraw-Hill Companies, Inc.

hor·i·zon·tal plane

(hōr'i-zon'tăl plān)
Surface parallel and relative to the horizon; in the anatomic position, horizontal planes are transverse planes; in the supine or prone positions, horizontal planes are frontal.
Medical Dictionary for the Dental Professions © Farlex 2012
References in periodicals archive ?
By multiplying the solar radiation on the window by 2, it is roughly converted into an equivalent radiation falling on an outdoor horizontal plane, as if all that radiation was diffuse.
For the viscoelastic fluid, two vortices close to the inlet of the abruptly expanded cylinder are observed not only on the horizontal plane but also on the vertical plane.
In the same place also formed small eddies in horizontal plane. Along the wide electrodes appeared insignificant opposite flows directed from area of connection of the cables.
Adjustable extrusion heads are said to be uniquely capable of changing both x-axis and y-axis dimensions during extrusion by means of spindle-actuated slides for the horizontal plane, and a spindle-actuated upper ledge for adjusting extrusion thickness.
The ability to localize a virtual sound source in the horizontal plane was evaluated under varying levels of sustained ([+G.sub.z]) acceleration.
The collectors should face due south and be set at an angle of 18 to 50 degrees from the horizontal plane.
The linear vibrating movement is obtained with a unique patented solution by locating the vibrators on the side plates with the counterweight shaft parallel to the side plate and inclined at 45[degrees] from the horizontal plane. Unlike conventional screen designs, where this solution causes problems to the structural resistance of the screen body as the side plates cannot withstand the lateral compression and tension forces, IMS has attached the vibrators to a self-carrying, robust vibrating structure to which the actual screen body in light construction is then attached.
FH Frankfort horizontal plane. A line connecting the PO and OR points (figures 1-3).
A horizontal plane of glass the size of a large painting cuts through a much larger and longer plate of steel, freeing it of some of its weight, opening it up.
Some cells were sharpened in only one plane (n = 15, with only mid-sagittal plane sharpening in 11 cells, and only horizontal plane sharpening in 4 cells).
By contrast, in the horizontal plane, the variability of antigravitational forces (and therefore of the gravitational cues they generate) is minimal: because the participant's movements are performed in front of the participant in a direction perpendicular to gravity, they require constant antigravitational forces.
* Focus--Keep eyes straight ahead on a horizontal plane. Avoid tilting your head up or down, right or left.