noun
lifetime; survival period
Refers to the length of time a person, organism, or thing survives or remains functional. Often used in medical, biological, or technical contexts.
この治療法は患者の生存期間を延ばす可能性がある。
This treatment may extend the patient's survival period.
野生での生存期間は飼育下より短い。
The lifespan in the wild is shorter than in captivity.
寿命 is the more common word for natural lifespan or life expectancy, while 生存期間 is more technical and emphasizes the duration of survival under specific conditions.
Compound of 生存 (survival, existence) and 期間 (period, term). The exact historical derivation is uncertain, but the components are straightforward.