名詞 bitumen:

1. any of various naturally occurring impure mixtures of hydrocarbons

1. Like or containing bitumen.
   瀝青的，含瀝青的

bi.tu.men

n.（名詞）
Any of various flammable mixtures of hydrocarbons and other substances, occurring naturally or obtained by distillation from coal or petroleum, that are a component of asphalt and tar and are used for surfacing roads and for waterproofing.
瀝青，柏油：一種碳?xì)浠衔锖推渌镔|(zhì)的易燃混合物，自然產(chǎn)生或通過蒸餾煤或石油而獲得，是瀝青和焦油的混合物，用于鋪路和防水

來源：
Middle English bithumen [a mineral pitch from the Near East]
中古英語 bithumen [近東的一種瀝青]
from Latin bitômen
源自 拉丁語 bitômen
[perhaps of Celtic origin]
[可能源于凱爾特語的]

【引伸】
bitu.minoid.