Latera recta

latus rectum

[ley-tuhs rek-tuhm]
noun, plural latera recta [ley-ter-uh rek-tuh] . Geometry.
the chord perpendicular to the principal axis and passing through a focus of an ellipse, parabola, or hyperbola.

1695–1705; < Neo-Latin: literally, straight side Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
latus rectum (ˈlɑːtəs ˈrɛktəm)
n , pl latera recta
geometry a chord that passes through the focus of a conic and is perpendicular to the major axis
[C18: New Latin: straight side]

Collins English Dictionary - Complete & Unabridged 10th Edition
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