also: ばく
noun, used as a suffix
Academic suffix or abbreviated compound element, used after a field name to mean a doctoral degree or doctor in that field, as in 工博 or 理博. It is much less conversational than the full word 博士.
彼女は理博の学位を取得した。
She earned a Doctor of Science degree.
名刺には「工博」と記されていた。
The business card said “Doctor of Engineering.”
noun, used as a suffix
Suffix or abbreviated compound element in names of expositions and fairs, often corresponding to a shortened form of 博覧会. Compound readings may include sound changes, such as 万博 read ばんぱく.
大阪万博には世界中から人が集まった。
People gathered from around the world for the Osaka Expo.
花博の会場で新しい品種のバラを見た。
I saw a new variety of rose at the flower expo.
Sino-Japanese kanji morpheme 博. In these suffix uses it functions as a shortened compound element connected with doctoral titles and expositions; the exact development is compound-specific.