ob‧sid‧i‧an /əbˈsɪdiən/
noun [uncountable][
Date: 1300-1400;
Language: Latin;
Origin: obsidianus lapis, mistake for obsianus lapis 'stone of Obsius', a Roman traveler said to have discovered the rock]
a type of rock that looks like black glass
[TahlilGaran] Dictionary of Contemporary English ▲