へぼ医者[heboisha] quack doctor
医員[iin] medical staff
医院[iin] doctor's office (surgery)
医院長[iinchou] head doctor
医化学[ikagaku] medical chemistry

医家[ika] doctor
医科[ika] medical science
医科大学[ikadaigaku] medical school
医会[ikai] medical society

お大事に[odaijini] take care of yourself
暗黒大陸[ankokutairiku] Dark Continent (i.e. Africa)
伊勢大神宮[isedaijinguu] the Grand Shrines of Ise
伊勢大廟[isetaibyou] the Grand Shrines of Ise
偉大[idai] greatness

医科大学[ikadaigaku] medical school
医大[idai] medical university
井の中の蛙大海を知らず[inonakanokawazutaikaiwoshirazu] parochial
一大[ichidai] one large ...
一大事[ichidaiji] serious affair