doctoral
adj. C1 Advanced US //ˈdɑktɝəɫ// UK //dˈɒktəɹəl// doc·tor·al
adj. relating to a doctorate, the highest academic degree you can earn. You use this word to describe the final stage of university study.
adj. relating to or characteristic of a doctorate or the holder of such a degree. Typically used in academic and institutional contexts.
She is writing her doctoral thesis.
The university offers several doctoral programs in science and engineering.
Her doctoral research focused on the subtle changes in climate patterns over the last century.
From doctor + -al, probably modelled on Latin doctorālis.