单词	biosignature
释义	biosignature noun bio·​sig·​na·​ture ¦bī-(ˌ)ō-¦sig-nə-ˌchu̇r+  plural biosignatures : something (such as a chemical compound, isotope, or cellular component) that indicates or suggests the presence of a biological process indicative of life This will help astronomers learn to recognize "biosignatures"—clues that a planet's atmosphere has been influenced by life. Karen Schmidt, New Scientist, 2 July 2005 … the potential of the microbes to become fossils and serve as "biosignatures" for researchers seeking signs of early life in the remnants of ancient volcanism and hydrothermal activity on Earth—and, particularly, on Mars. David Perlman, San Francisco Chronicle, 21 Apr. 2005 Word History Etymology bi- entry 2 + signature First Known Use 1995, in the meaning defined above
随便看	sauropods sauropsid Sauropsida sauropsidan sauropsidans sauropsidian Sauropterygia sauropterygiae sauropterygian sauropterygias Saurornithes saurosuchi saurosuchuses saurosuchusses Saururaceae saururaceaes saururaceous Saururae saururi Saururus saururuses saururusses saury saus sausage

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