acra

肢端

词形变化

only 复数

释义与例句

n.
  1. 1.

    The vascular areas of the body most removed from the heart.

    仅复数 罕用 医学

词源

From Ancient Greek ἀ̆κρᾰ (ăkră), probably back-formed from German Akren as this is more easily encountered and even the English is most likely found in books written by Germans.

来源：wiktionary