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	aggressor aggrieved aghast agile agility aging agitate agitated agitation agitator agitprop aglitter aglow Agnew, Spiro agnostic agnosticism ago agog agonize agonized agonizing agonizingly agony agora agoraphobia

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