noun
biosignature
Scientific term used in astrobiology and related fields to refer to any measurable indicator of past or present life.
火星の大気から生命存在指標を探す研究が進んでいる。
Research is progressing to search for biosignatures in the Martian atmosphere.
Compound of 生命 (life) + 存在 (existence) + 指標 (indicator). A modern technical coinage, likely calqued from English 'biosignature'.