dissertation

US /ˌdɪs.ɚˈteɪ.ʃən/
UK /ˌdɪs.ɚˈteɪ.ʃən/
"dissertation" picture
1.

thèse, mémoire

a long essay on a particular subject, especially one written as a requirement for a university degree or diploma

:
She spent a year writing her doctoral dissertation.
Elle a passé un an à écrire sa thèse de doctorat.
His master's dissertation focused on medieval history.
Sa thèse de master portait sur l'histoire médiévale.