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	dialectic dialectical dialogue dialogue box dial tone dial-up dialysis diameter diametrically diamond diamond anniversary diamond lane Diana diaper diaper rash diaphanous diaphragm diarist diarrhea diary Dias, Bartolomeu diaspora diastole diastolic diatomic molecule

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