What is "crux"

Crux \Crux\ (kr[u^]ks), n.; pl. E. Cruxes (-[e^]z), L. Cruces (kr[udd]"s[=e]z). [L., cross, torture, trouble.] Anything that is very puzzling or difficult to explain.
--Dr. Sheridan.

The perpetual crux of New Testament chronologists.
--Strauss. [1913 Webster] ||

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.

n. 1 The basic, central, or essential point or feature. 2 The critical or transitional moment or issue, a turning point. 3 A puzzle or difficulty. 4 The hardest point of a climb. 5 (context heraldiccharge English) A cross on a coat of arms.

CRUX is a lightweight, x86-64-optimized Linux distribution targeted at experienced Linux users and delivered by a tar.xz-based package system with BSD-style initscripts. It is not based on any other Linux distribution. It also utilizes a ports system to install and upgrade applications.

Although crux is the Latin word for "cross," the choice of the name "CRUX" itself has no meaning. Per Lidén chose it because it "sounded cool," and ends in "X" which makes it Unix/Linux-ish.

Crux or Southern Cross, is the smallest of the 88 modern constellations.

Crux may refer to:

Crux is an American comic book published by CrossGen Entertainment from May 2001 to February 2004. It was cancelled due to bankruptcy in 2004. Crux was one of the later titles that came first in a sort of second wave of Crossgen titles which included Sojourn and Brath. It detailed the exploits of six Atlanteans who were put into stasis and are awoken 100, 000 years later.

Crux ( Latin for "cross", "gallow", or "t-shape") is a term applied by palaeographers, textual critics, bibliographers, and literary scholars to a point of significant corruption in a literary text. More serious than a simple slip of the pen or typographical error, a crux (probably deriving from Latin crux interpretum = "crossroad of interpreters") is difficult or impossible to interpret and resolve. Cruxes occur in a wide range of pre-modern ( ancient, medieval, and Renaissance) texts, printed and manuscript.

The modern constellation Crux is not included in the Three Enclosures and Twenty-Eight Mansions system of traditional Chinese uranography because its stars are too far south for observers in China to know about them prior to the introduction of Western star charts. Based on the work of Xu Guangqi and the German Jesuit missionary Johann Adam Schall von Bell in the late Ming Dynasty, this constellation has been classified as one of the 23 Southern Asterisms (近南極星區, Jìnnánjíxīngōu) under the name Cross (十字架, Shízìjià).

Possibly Acrux (Alpha Crucis), Mimosa (Beta Crucis) and Gacrux (Gamma Crucis) are bright stars in this constellation that never seen in Chinese sky.

The name of the western constellation in modern Chinese is 南十字座 (nán shí zì zuò), meaning "the southern cross-shaped constellation".

A crux in climbing, mountaineering and high mountain touring is the most difficult section of a route, or the place where the greatest danger exists. In sport climbing and bouldering the most challenging point is also called the crux. In describing a climbing route using a topo, cruces (or cruxes) are usually shown with a key symbol.

The grade of a climbing route is based on the difficulty of the crux. That means the rest of the route can be considerably easier. In addition a route may comprise several cruces. There are also routes, however, that have a very consistent level of difficulty with no sections that stand out as harder than the rest.

In planning a route it is important to know how far it is before the crux is reached, because cruces can only be overcome with sufficient reserves of strength.