ephemeron是什么意思

ephemeron

英 [ɪ'femərɒn] 美 [ɪ'fɛmə,rɑn]

ephemeron (n.): "insect which lives for a very short time in its winged state," 1620s, from Greek (zoon) ephemeron, neuter of adjective ephemeros "living but a day" (see ephemera). Figurative use by 1771.