健けん脳のう剤ざい

noun

brain tonic; nootropic

A medicinal or supplemental agent intended to improve brain function, memory, or mental clarity. Often used in health and supplement contexts.

• この健けん脳のう剤ざいは集しゅう中ちゅう力りょくを高たかめると言いわれている。

  This brain tonic is said to improve concentration.