A doctoral degree awarded by a university (commonly a PhD); granted after submission and examination of scholarly research, typically the highest academic degree.
彼は有機化学の分野で博士号を取得した。
He obtained a doctoral degree in the field of organic chemistry.
博士号を取るには、通常数年の研究と厳しい審査が必要だ。
Earning a doctoral degree usually requires several years of research and a rigorous review.
大学は彼女に名誉博士号を授与した。
The university awarded her an honorary doctorate.