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trajectory

[truh-jek-tuh-ree] /trəˈdʒɛk tə ri/
noun, plural trajectories.
1.
the curve described by a projectile, rocket, or the like in its flight.
2.
Geometry. a curve or surface that cuts all the curves or surfaces of a given system at a constant angle.
Origin
1660-1670
1660-70; < New Latin trājectōria, noun use of feminine of Medieval Latin trājectōrius cast-ing over. See traject, -tory1
Related forms
trajectile
[truh-jek-til, -tahyl] /trəˈdʒɛk tɪl, -taɪl/ (Show IPA),
adjective
trajection
[truh-jek-shuh n] /trəˈdʒɛk ʃən/ (Show IPA),
noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for trajectile

trajectory

/trəˈdʒɛktərɪ; -trɪ/
noun (pl) -ries
1.
the path described by an object moving in air or space under the influence of such forces as thrust, wind resistance, and gravity, esp the curved path of a projectile
2.
(geometry) a curve that cuts a family of curves or surfaces at a constant angle
Derived Forms
trajectile (trəˈdʒɛktaɪl) adjective
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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Word Origin and History for trajectile

trajectory

n.

1690s, from Modern Latin trajectoria, from fem. of trajectorius "of or pertaining to throwing across," from Latin traiectus "thrown over or across," past participle of traicere "throw across," from Latin trans- "across" (see trans-) + icere, combining form of iacere "to throw" (see jet (v.)). Used in Late Latin and Middle English to mean "a funnel."

Online Etymology Dictionary, © 2010 Douglas Harper
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trajectile in Science
trajectory
  (trə-jěk'tə-rē)   
  1. Physics The line or curve described by an object moving through space.

  2. Mathematics A curve or surface that passes through a given set of points or intersects a given series of curves or surfaces at a constant angle.


The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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