coaxial

[koh-ak-see-uhl] Origin

co·ax·i·al

[koh-ak-see-uhl]
adjective
1.
Also, co·ax·al [koh-ak-suhl] . having a common axis or coincident axes.
2.
Geometry.
a.
(of a set of circles) having the property that each pair of circles has the same radical axis.
b.
(of planes) intersecting in a straight line.
3.
(of a loudspeaker) having two or more cones with their centers mounted on the same axis.

Origin:
1880–85; co- + axial

co·ax·i·al·ly, adverb
un·co·ax·al, adjective
un·co·ax·i·al, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Coaxial is always a great word to know.
So is interrobang. Does it mean:
a printed punctuation mark (‽), available only in some typefaces, designed to combine the question mark (?) and the exclamation point (!), indicating a mixture of query and interjection, as after a rhetorical question.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
Collins
World English Dictionary
coaxial or coaxal (kəʊˈæksɪəl, kəʊˈæksəl)
 
adj
1.  having or being mounted on a common axis
2.  geometry (of a set of circles) having all the centres on a straight line
3.  electronics formed from, using, or connected to a coaxial cable
 
coaxal or coaxal
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Etymonline
Word Origin & History

coaxial
1904, as a term in mathematics; coaxial cable is 1934. See com- + axis.
Online Etymology Dictionary, © 2010 Douglas Harper
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