- bitumen
[bitumen 词源字典]
- bitumen: see cud
[bitumen etymology, bitumen origin, 英语词源] - bitumen (n.)
- mid-15c., from Latin bitumen "asphalt," probably, via Oscan or Umbrian, from Celtic *betu- "birch, birch resin" (compare Gaulish betulla "birch," used by Pliny for the tree supposedly the source of bitumen).