ペナンブラ

noun

penumbra (astronomy)

In astronomy, the partially shaded outer region of a shadow, especially during an eclipse.

• 月げっ食しょくでは、ペナンブラの部ぶ分ぶんは本ほん影えいほど暗くらくならない。

  During a lunar eclipse, the penumbral area does not become as dark as the umbra.

noun

penumbra (medicine)

In medicine, a region of reduced perfusion or metabolic activity, often used in the context of ischemic stroke.

• 脳のう梗こう塞そくのペナンブラ領りょう域いきを救すくうことが治ち療りょうの鍵かぎとなる。

  Saving the penumbra region in a cerebral infarction is key to treatment.