单词 | ash |
释义 | ash [ash] BOTANY 1. A tree of the genus Fraxinus, deciduous trees of the olive family (Oleaceae) characterized by opposite, pinnate leaflets. 2. Any of various Australian trees having wood of great toughness and strength; used for tool handles and in work requiring flexibility. CHEMISTRY The incombustible matter remaining after a substance has been incinerated. ENGINEERING An undesirable constituent of diesel fuel whose quantitative measurement indicates degree of fuel cleanliness and freedom from abrasive material. GEOLOGY Volcanic dust and particles less than 4 millimeters in diameter. |
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