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latus rectum

[ley-tuh s rek-tuh m] /ˈleɪ təs ˈrɛk təm/
noun, plural latera recta
[ley-ter-uh rek-tuh] /ˈleɪ tər ə ˈrɛk tə/ (Show IPA).
Geometry
1.
the chord perpendicular to the principal axis and passing through a focus of an ellipse, parabola, or hyperbola.
Origin
1695-1705
1695-1705; < Neo-Latin: literally, straight side
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for latera recta

latus rectum

/ˈlɑːtəs ˈrɛktəm/
noun (pl) latera recta (ˈlætərə ˈrɛktə)
1.
(geometry) a chord that passes through the focus of a conic and is perpendicular to the major axis
Word Origin
C18: New Latin: straight side
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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