单词	obsidian
释义	obsidianobsidian /əbˈsɪdiən/ noun [uncountable] Etymology ETYMOLOGYobsidian Origin: 1300-1400 Latin obsidianus lapis, mistake for obsianus lapis stone of Obsius, a Roman traveler said to have discovered the rock a type of dark rock which looks like glass
随便看	oil paint oil painting oil pan oil platform oil reserve oil rig oilskin oil slick oil strike oil tanker oil well oily oink ointment OJ Ojibwe OK O'Keeffe, Georgia Okefenokee okey-doke okie Oklahoma Oklahoma City okra old

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