画期的

かっきてき【画期的】

～な epoch-making 《event》; epochal; landmark 《event》; watershed 《development》.

●画期的な出来事 an epoch-making event [affair, occurrence]; an epochal event; an event that marks the end of an epoch [start of a new epoch]

・画期的な発明 an epoch-making invention

・画期的な考え方 a revolutionary [completely new] way of thinking

・女性が医者になるのは当時としては画期的なことであった. In those days, for a woman to become a doctor was revolutionary [unprecedented].

・スペースシャトルの誕生は宇宙旅行を身近なものにする宇宙探査史上画期的なものである. The advent of the space shuttle was an epoch-making event in the history of space exploration that has familiarized us with space travel.

・すべてのがんに効く画期的な新薬の登場が待たれる. We are awaiting the appearance of a revolutionary new drug effective for all cancers.