Dictionary.com

crux

[ kruhks ]
/ krʌks /
Save This Word!

noun, plural crux·es, cru·ces [kroo-seez]. /ˈkru siz/.

a vital, basic, decisive, or pivotal point: The crux of the trial was his whereabouts at the time of the murder.
a cross.
something that torments by its puzzling nature; a perplexing difficulty.

QUIZZES

QUIZ YOURSELF ON THE MANY TYPES OF NOUNS

They're everywhere you turn, but can you identify the 10 types of nouns easily? This quiz will test your mettle against singular, plural, concrete, abstract, common, proper, collective, compound, countable, and uncountable nouns!
Question 1 of 7
Shoelaces, rainbow, toothpaste, and haircuts are all what type of noun?

Meet Grammar Coach

Write or paste your essay, email, or story into Grammar Coach and get grammar helpImprove Your Writing

Meet Grammar Coach

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

Origin of crux

1635–45; <Latin: stake, scaffold, or cross used in executions, torment; figurative senses perhaps <New Latin crux (interpretum) (commentators') torment, a difficult passage in a text; cf. crucial

Definition for crux (2 of 2)

Crux
[ kruhks ]
/ krʌks /

noun, genitive Cru·cis [kroo-sis]. /ˈkru sɪs/. Astronomy.

Origin of Crux

<Latin: a cross
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2021

Example sentences from the Web for crux

British Dictionary definitions for crux (1 of 2)

crux
/ (krʌks) /

noun plural cruxes or cruces (ˈkruːsiːz)

a vital or decisive stage, point, etc (often in the phrase the crux of the matter)
a baffling problem or difficulty
mountaineering the most difficult and often decisive part of a climb or pitch
a rare word for cross

Word Origin for crux

C18: from Latin: cross

British Dictionary definitions for crux (2 of 2)

Crux
/ (krʌks) /

noun Latin genitive Crucis (ˈkruːsɪs)

the more formal name for the Southern Cross
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

Medical definitions for crux

crux
[ krŭks, kruks ]

n. pl. crux•es

A cross or a crosslike structure.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
See Today's Synonym