Thèse vs. dissertation

In the French language, 'thèse' and 'dissertation' are both used in academic contexts, but they refer to different types of academic work. Understanding the difference between these terms is crucial for students and academics.

Thèse

'Thèse' refers to a document submitted in support of candidacy for an academic degree or professional qualification, presenting the author's research and findings. In France, it is particularly used for work at the doctoral level.
Après quatre ans de recherche, elle a finalement soutenu sa thèse en chimie.
(After four years of research, she finally defended her thesis in chemistry.)
La thèse de doctorat était centrée sur l'étude des écosystèmes marins.
(The doctoral thesis focused on the study of marine ecosystems.)

Dissertation

In the French educational system, 'dissertation' often refers to a detailed essay or paper written by students over the course of an academic semester or as part of their master's degree program. It is not limited to doctoral theses.
Il a passé tout le semestre à travailler sur sa dissertation sur l'histoire médiévale.
(He spent the entire semester working on his dissertation on medieval history.)
Sa dissertation de master explorait les conséquences économiques du réchauffement climatique.
(Her master's dissertation explored the economic consequences of global warming.)

Summary

In summary, while both 'thèse' and 'dissertation' can be translated as 'thesis' or 'dissertation' in English, in the French educational context, 'thèse' typically refers to a substantial piece of original research conducted for a doctoral degree, while 'dissertation' is used more broadly to refer to detailed essays or research papers written as part of a master's degree or undergraduate coursework.