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.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
How to use nodal point in a sentence
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.Facebook, WhatsApp, Google and other internet giants comply with India’s IT rules | Manish Singh | May 28, 2021 | TechCrunch
At each nodal-point of the hexagon arises one short conical papilla or thorn.
At each nodal-point arises a bristle-shaped radial spine, about as long as the radius.
Often each nodal-point of the network develops on the shell surface one spine.
At each nodal-point of the hexagon arises a short bristle-shaped, simple by-spine.
At each nodal-point of the outer shell arises a bristle-shaped radial spine, half as long as the radius.