principal point
noun
: either of two points on the principal axis of a lens where the object and image have the same size and are not inverted in relation to each other
Cite this Entry
“Principal point.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/principal%20point. Accessed 4 Nov. 2025.
Copy CitationLove words? Need even more definitions?
Merriam-Webster unabridged
Share