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noun Astronomy.
  1. genitive of Crux.

Origin of Crucis

From Latin


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

Origin of Crux

< Latin: a cross
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for crucis

Historical Examples

British Dictionary definitions for crucis


noun Latin genitive Crucis (ˈkruːsɪs)
  1. the more formal name for the Southern Cross


noun plural cruxes or cruces (ˈkruːsiːz)
  1. a vital or decisive stage, point, etc (often in the phrase the crux of the matter)
  2. a baffling problem or difficulty
  3. mountaineering the most difficult and often decisive part of a climb or pitch
  4. a rare word for cross

Word Origin

C18: from Latin: 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

Word Origin and History for crucis



1814, "cross," from Latin crux "cross" (see cross (n.)). Figurative use for "a central difficulty," is older, from 1718; perhaps from Latin crux interpretum "a point in a text that is impossible to interpret," in which the literal sense is something like "crossroads of interpreters." Extended sense of "central point" is from 1888.

Online Etymology Dictionary, © 2010 Douglas Harper

crucis in Medicine


(krŭks, kruks)
n. pl. crux•es
  1. 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.