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definitions

traject

[truh-jekt]
verb (used with object) Archaic.
  1. to transport, transmit, or transpose.

Origin of traject

1545–55; < Latin trājectus (past participle of trāicere to cast, throw over or across), equivalent to trā- (variant of trāns- trans-) + -jec- (combining form of jacere to throw) + -tus past participle suffix
Related formstra·jec·tion, noun

trajectory

[truh-jek-tuh-ree]
noun, plural tra·jec·to·ries.
  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 of trajectory

1660–70; < New Latin trājectōria, noun use of feminine of Medieval Latin trājectōrius cast-ing over. See traject, -tory1
Related formstra·jec·tile [truh-jek-til, -tahyl] /trəˈdʒɛk tɪl, -taɪl/, adjectivetra·jec·tion [truh-jek-shuh n] /trəˈdʒɛk ʃən/, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for trajection

traject

verb
  1. (tr) archaic to transport or transmit
Derived Formstrajection, noun

Word Origin for traject

C17: from Latin trājectus cast over, from trāicere to throw across, from trans- + iacere to throw

trajectory

noun plural -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 Formstrajectile (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
Word Origin and History for trajection

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
trajection in Science

trajectory

[trə-jĕk′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 © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.