catenaries

[kat-n-er-ee; especially Brit. kuh-tee-nuh-ree]

cat·e·nar·y

[kat-n-er-ee; especially Brit. kuh-tee-nuh-ree] noun, plural cat·e·nar·ies, adjective
noun
1.
Mathematics. the curve assumed approximately by a heavy uniform cord or chain hanging freely from two points not in the same vertical line. Equation: y = kcosh(x/k).
2.
(in electric railroads) the cable, running above the track, from which the trolley wire is suspended.
adjective
3.
of, pertaining to, or resembling a catenary.
4.
of or pertaining to a chain or linked series.

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Catenaries is always a great word to know.
So is quincunx. Does it mean:
a chattering or flighty, light-headed person.
an arrangement of five objects, as trees, in a square or rectangle, one at each corner and one in the middle.

Origin:
1780–90; < Latin catēnārius relating to a chain, equivalent to catēn(a) a chain + -ārius -ary
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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