| 释义 |
petrichor|ˈpɛtrɪkə(r)|
[f. petro- + ichor.]
A pleasant, distinctive smell that frequently accompanies the first rain after a long period of warm, dry weather in certain regions; in quot. 1975, applied to an oily substance obtained from the ground in which this smell was concentrated.
1964Bear & Thomas in Nature 7 Mar. 993/2 The diverse nature of the host materials has led us to propose the name ‘petrichor’ for this apparently unique odour which can be regarded as an ‘ichor’ or ‘tenuous essence’ derived from rock or stone. This name, unlike the general term ‘argillaceous odour’, avoids the unwarranted implication that the phenomenon is restricted to clays or argillaceous materials; it does not imply that petrichor is necessarily a fixed chemical entity but rather it denotes an integral odour. 1971Listener 4 Nov. 612/3 No matter what kind of rock or earth was used, the oily essence always possessed the aroma of petrichor—the smell of rain falling on dry ground. 1975Sunday Mail (Brisbane) 2 Nov. 32/2 CSIROs Melbourne mineral chemistry division discovered that it was not fungi or dead vegetation which produced the smell, but small yellowish-gold oily globules. The globules, nicknamed ‘petrichor’ or ‘essence of rock’ by the researchers, contained at least 50 different compounds, not unlike a perfume and were absorbed into the ground from the air. |