bicorn


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bicorn

[′bī‚kȯrn]
(mathematics)
A plane curve whose equation in cartesian coordinates x and y is (x 2 + 2 ay - a 2)2 = y 2(a 2 - x 2), where a is a constant.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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References in periodicals archive ?
The bicorn or cocked hat that Napoleon Bonaparte, Andrew Jackson, and many general officers of the army and navy wore during the late 18th and 19th centuries was essentially the same concept with the brims folded on opposite sides against the crown.
His carrot-haired Paroles was inflated with pomposity and braggadocio as he strutted about in a red feathered bicorn hat and red and blue uniform.
Advertisements in windows depicted a man with a full face wearing a bicorn hat, right arm tucked under his vest on his belly, left folded behind his back.
Other items for sale were the quill recovered from Nelson's desk after Trafalgar, found lying beside an unfinished letter to his lover Emma Hamilton, which sold for pounds 8,400 and a beaverskin bicorn hat worn by Napoleon, which went for pounds 66,000
Another of those shown was Nelson's bicorn hat, worn at the Battle of Copenhagen in the same year.