Correct spelling for the English word "Trajection" is [tɹˈe͡ɪd͡ʒkʃən], [tɹˈeɪdʒkʃən], [t_ɹ_ˈeɪ_dʒ_k_ʃ_ə_n] (IPA phonetic alphabet).
A throwing or casting over; transportation.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.