(n) A principal orthographic plane of projection, used to define both the top and bottom orthographic views.
Divides the body into a superior (or upper) and an inferior (or lower) section.
A plane that extends perpendicular to the length of the body dividing it into superior and inferior portions. Also called transverse plane.
a plane that is perpendicular to the vertical line or parallel with the horizon at a point
A transverse plane at right angle to the long axis of the body
A plane which lies in a crosswise direction.
A horizontal plane that divides the body into upper (superior) and lower (inferior) sections. Also called the transverse plane.
A plane that is parallel to the horizon; flat. A transverse plane.
An imaginary plane that is tangent (or parallel) to the earth's surface at a given location.
In astronomy, geography, geometry and related sciences and contexts, a plane is said to be horizontal at a given point if it is locally perpendicular to the gradient of the gravity field, i.e., with the direction of the gravitational force (per unit mass) at that point.