| 释义 |
ob·sid·i·an
\əbˈsidēən, äb-\ noun
(-s)
Etymology: New Latin obsidianus, from Latin Obsidianus lapis (MS variant of Obsianus lapis), literally, stone of Obsidian, from Obsidius (MS variant of Obsius), Roman traveler named by Pliny as its discoverer + -ianus -ian
: volcanic glass that is generally black, banded, or spherulitic and has a marked conchoidal fracture, a bright luster, and a composition similar to rhyolite but usually with more water |