principal point

noun

, Optics.

1. the point where a principal plane intersects the axis.

Word History and Origins

Origin of principal point¹

First recorded in 1695–1705

Example Sentences

Rather than seeing records as marketing adjuncts to concert tours, he showed that recordings could be the principal point of contact — in his case, the only point — between musicians and their fans.

From Los Angeles Times

Let me stress that all of the above would make superb gifts, but my principal point is simply: Find out what your friends and loved ones like, then seek out books that will surprise them.

From Washington Post

But passing judgment on him really isn’t the principal point of the committee’s evidence.

From Washington Post

Just to be clear, making it possible for more women to take paid jobs isn’t the principal point of this plan — and there’s nothing wrong with parents’ choosing to stay at home and care for their kids.

From Seattle Times

His principal point is that the power of the real-estate state flows from the dynamic between development and the profession of city planning.

From The New Yorker