relative aperture

Save This Word!

noun Optics.

the ratio of the diameter of a lens, especially a camera lens, to the focal length; the reciprocal of the f number or focal ratio of the lens.

QUIZ

ARE YOU A TRUE BLUE CHAMPION OF THESE "BLUE" SYNONYMS?

We could talk until we're blue in the face about this quiz on words for the color "blue," but we think you should take the quiz and find out if you're a whiz at these colorful terms.

Question 1 of 8

Which of the following words describes “sky blue”?

navy

beryl

azure

TAKE THE QUIZ TO FIND OUT

Meet Grammar Coach

Write or paste your essay, email, or story into Grammar Coach and get grammar help

Improve Your Writing

Meet Grammar CoachImprove Your Writing

Also called aperture ratio .

Origin of relative aperture

First recorded in 1885–90

Words nearby relative aperture

relations, relationship, relationship marketing, relative, relative accommodation, relative aperture, relative atomic mass, relative bearing, relative clause, relative complement, relative density

How to use relative aperture in a sentence

But relative to centuries past, America is a marvel of domestic tranquility.
No Gods, No Cops, No Masters|James Poulos|January 1, 2015|DAILY BEAST
Parents who want to transfer custody of a child to someone other than a relative must seek permission from a judge.
Judge: Rehoming Kids Is Trafficking|Tina Traster|December 30, 2014|DAILY BEAST
While traveling this holiday season, a relative and I were pulled over by a police officer.
Obama Is Right on Race. The Media Is Wrong.|Keli Goff|December 29, 2014|DAILY BEAST
Of course, this is The Comeback, and so "success" is a relative word.
‘The Comeback’ Finale: Give Lisa Kudrow All of the Awards|Kevin Fallon|December 29, 2014|DAILY BEAST

Her son peeked out the window and told me his mother had left Havana for La Lisa to visit a dying relative.
The Life and Hard Times Of The Family A Cuban Defector Left Behind|Brin-Jonathan Butler|December 19, 2014|DAILY BEAST
But I suppose, as he is my nearest relative, it is but natural he should be anxious about my health.
The Pit Town Coronet, Volume I (of 3)|Charles James Wills
In the aperture of the window, amid piles of paper, stood a rickety old table, covered with dust.
Hilda Lessways|Arnold Bennett
This had been quite genuine, for the Professor had been fond of his relative, who had always been very good to him.
Uncanny Tales|Various
Hilda suggested that the ticket-clerk should be interrogated, but the aperture of communication with him was shut.
Hilda Lessways|Arnold Bennett
The relative quantity of labor embodied in each object is the basis of its value.
The Unsolved Riddle of Social Justice|Stephen Leacock

British Dictionary definitions for relative aperture

relative aperture

noun

photog the ratio of the equivalent focal length of a lens to the effective aperture of the lens; written as f/n, f:n, or fn, where n is the numerical value of this ratio and is equivalent to the f-number

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012