nodal point

noun

, Optics.

1. 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.

Word History and Origins

Origin of nodal point¹

First recorded in 1835–45

Example Sentences

India’s new IT rules, unveiled in February this year, require firms to appoint and share contact details of representatives tasked with compliance, nodal point of reference and grievance redressals to address on-ground concerns.

From TechCrunch

At each nodal-point of the hexagon arises one short conical papilla or thorn.

From Project Gutenberg

At each nodal-point arises a bristle-shaped radial spine, about as long as the radius.

From Project Gutenberg

Often each nodal-point of the network develops on the shell surface one spine.

From Project Gutenberg

At each nodal-point of the hexagon arises a short bristle-shaped, simple by-spine.

From Project Gutenberg

At each nodal-point of the outer shell arises a bristle-shaped radial spine, half as long as the radius.

From Project Gutenberg