tetrameter (n.)youdaoicibaDictYouDict[tetrameter 词源字典]
1610s, from Late Latin tetrametrus, from Greek tetrametron "verse of four measures" (generally trochaic), noun use of neuter of tetrametros (adj.) "having four measures," from tetra- "four" (see tetra-) + metron "measure" (see meter (n.2)).[tetrameter etymology, tetrameter origin, 英语词源]