focal length Meaning in the Cambridge English Dictionary

Meaning of “focal length” in the English Dictionary

"focal length" in British English

See all translations

focal lengthnoun [C usually singular]

uk   us   specialized
the ​distance between a ​point where ​waves of ​lightmeet and the ​centre of a lens
(Definition of focal length from the Cambridge Advanced Learner’s Dictionary & Thesaurus © Cambridge University Press)
Translations of “focal length”
in Chinese (Simplified) 焦距…
in Chinese (Traditional) 焦距…
What is the pronunciation of focal length?
Add Cambridge dictionaries to your browser to your website
Word of the Day


a large group of soldiers who form a part of an army, especially the ancient Roman army

Word of the Day

There is no such thing as a true synonym in English. Discuss!
There is no such thing as a true synonym in English. Discuss!
by Kate Woodford,
November 25, 2015
In the Cambridge Advanced Learner’s Dictionary the word ‘synonym’ is defined as ‘a word or phrase that has the same or nearly the same meaning as another word or phrase in the same language’. As you might expect, definitions for this word are broadly similar in other dictionaries and yet the italicized

Read More 

conversational user interface noun
conversational user interface noun
November 30, 2015
a computer interface that provides information to users in normal, conversational speech in response to spoken requests Nearly every major tech company—from Amazon to Intel to Microsoft to Google—is chasing the sort of conversational user interface that Kaplan and his colleagues at PARC imagined decades ago.

Read More