外がい因いん

noun

external cause; external origin; exogenous cause

Used in medical, scientific, or analytical contexts to refer to a cause or factor originating from outside a system, organism, or situation. Often contrasted with 内因 (internal cause).

• この病びょう気きの外がい因いんはまだ特とく定ていされていない。

  The external cause of this disease has not yet been identified.

• 外がい因いんと内ない因いんの両りょう方ほうを考こう慮りょする必ひつ要ようがある。

  It is necessary to consider both external and internal causes.