| 单词 | igneous |
| 释义 | igneous (once / 8590 pages) adj You might remember this one from earth science class. An igneous rock is one that forms through intense, fiery heat––usually in a volcano. It starts out molten (so hot it melts into liquid), then solidifies as it cools. So, it’s rock that has “ignited.” Igneous comes from the Latin ignis "fire." Granite and basalt are good examples of igneous rock that started out as blazing hot lava and morphed into harder stuff as their temperature dropped. FYI, the other main types of rocks are sedimentary and metamorphic and, technically, you could use igneous to describe other things that are rare or fiery, but it would sound pretty stilted and most people wouldn’t know what you meant. WORD FAMILYigneous USAGE EXAMPLESHybrid model: Igneous Systems released a product that operates much like a public cloud, but sits behind a company’s own firewall. Seattle Times(Oct 16, 2016) The most accepted theory is that Devils Tower was created by underground magma that cooled and hardened into igneous rock. US News(Oct 04, 2016) That makes sense, Lanza said, because manganese deposits are "always going to be the result of dissolved igneous rocks in water." Washington Post(Jul 01, 2016) 1adj produced by the action of fire or intense heat rocks formed by igneous agents Syn|Ant eruptive aqueous, sedimentary produced by the action of water 2adj produced under conditions involving intense heat igneous rock is rock formed by solidification from a molten state igneous fusion is fusion by heat alone Syn pyrogenic, pyrogenous 3adj like or suggestive of fire an igneous desert atmosphere Syn fiery hot used of physical heat; having a high or higher than desirable temperature or giving off heat or feeling or causing a sensation of heat or burning |
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