Words of the Day 29/6/10

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Conic (sections)  

 

con·ic
[kon-ik]

–adjective
1. Also, con·i·cal. having the form of, resembling, or pertaining to a cone.
–noun
2. Geometry . conic section.
 
 
Origin and History
conical
1560s, "pertaining to a cone," also "having the shape of a cone," from conic + -al (1).
conic
1560s, "pertaining to a cone," from L. conicus, from Gk. konikos "cone-shaped," from konos (see cone).
ellipse
1656 (implied in ellpitical), from Fr. ellipse, from L. ellipsis "ellipse," also, "a falling short, deficit," from Gk. elleipsis (see ellipse), because the conic section of the cutting plane makes a smaller angle with the base than does the side of the cone, hence, a "falling short." First applied by Apollonius of Perga (3c. B.C.E.).
 
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