nodal point
noun Optics.
either of two points on the axis of a lens or other optical system, determined by extending an incident oblique ray and the corresponding refracted ray to the axis for the pair of rays that are parallel outside the optical system.
Also called
node.
Origin of nodal point
First recorded in 1835–45
Words nearby nodal point
nod out,
nodal,
nodal bradycardia,
nodal escape,
nodal extrasystole,
nodal point,
nodal rhythm,
noddack,
nodding acquaintance,
nodding dog,
nodding donkey
Medical definitions for nodal point
nodal point
n.
One of the two points in a compound optical system, located so that a light ray directed through the first point will leave the system through the second point, parallel to its original direction.
axial point