T number

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noun Photography.

one of a series of calibrations of lens openings according to the intensity of the light actually transmitted by the lens. Symbol: T

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Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

How to use T number in a sentence

“Our members continue to face a number of challenges,” she said.
The Republican War on Kale|Patricia Murphy|January 7, 2015|DAILY BEAST
The number of dissenters though is unprecedented in the modern era.
Democrats Accidentally Save Boehner From Republican Coup|Ben Jacobs, Jackie Kucinich|January 6, 2015|DAILY BEAST
Marvin takes off his T-shirt and dives into his swimming pool.
The Story Behind Lee Marvin’s Liberty Valance Smile|Robert Ward|January 3, 2015|DAILY BEAST
Starting under Theodore Roosevelt and Howard Taft, embassies headed by career diplomats increased in number.
U.S. Embassies Have Always Been for Sale|William O’Connor|January 2, 2015|DAILY BEAST

The number of diplomats was pitiful (45 appointees in 1860), as was the amount of money allocated to them.
U.S. Embassies Have Always Been for Sale|William O’Connor|January 2, 2015|DAILY BEAST
The country is well inhabited, for it contains fifty-one cities, near a hundred walled towns, and a great number of villages.
Gulliver's Travels|Jonathan Swift
We had six field-pieces, but we only took four, harnessed wit twice the usual number of horses.
Blackwood's Edinburgh Magazine, No. CCCXXXIX. January, 1844. Vol. LV.|Various
There are a number of bacilli, called acid-fast bacilli, which stain in the same way as the tubercle bacillus.
A Manual of Clinical Diagnosis|James Campbell Todd
Five of the number had studied with Liszt before, and the young men are artists already before the public.
Music-Study in Germany|Amy Fay
There'll be heaps uh fun in the Cypress Hills country when they get t' runnin' the whisky-jacks out.
Raw Gold|Bertrand W. Sinclair

British Dictionary definitions for T number

T-number

T number

noun

photog a function of the f-number of a camera lens that takes into account the amount of light actually transmitted by the lens

Word Origin for T-number

from T (otal Light Transmission) 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