quad·ran·gu·lar

[kwo-drang-gyuh-ler]
adjective
having four angles and four sides; having the shape of a quadrangle.

Origin:
1585–95; < Late Latin quadrangulāris, equivalent to quadrangul(um) quadrangle + -āris -ar1

quad·ran·gu·lar·ly, adverb
quad·ran·gu·lar·ness, noun
sub·quad·ran·gu·lar, adjective
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
quadrangle (ˈkwɒdˌræŋɡəl) [Click for IPA pronunciation guide]
 
n
1.  geometry a plane figure consisting of four points connected by four lines. In a complete quadrangle, six lines connect all pairs of points
2.  Often shortened to: quad a rectangular courtyard, esp one having buildings on all four sides
3.  the building surrounding such a courtyard
 
[C15: from Late Latin quadrangulum figure having four corners]
 
quadrangular
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
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00:10
Quadrangular is always a great word to know.
So is bezoar. Does it mean:
a calculus or concretion found in the stomach or intestines of certain animals, esp. ruminants, formerly reputed to be an effective remedy for poison.
a children's mummer's parade, as on the Fourth of July, with prizes for the best costumes.
Example sentences
The butterfly is brown with yellow and white quadrangular spots on the forewings.
It goes without saying: a triangular pyramid is always surrounded by six quadrangular pyramids.
The stockade was quadrangular in shape with four sides of different lengths.
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