opal

play
noun \ˈō-pəl\

Definition of opal

  1. :  a usually amorphous mineral that is a hydrated silica softer and less dense than quartz and typically with definite and often marked iridescent play of colors and is used especially as a gem

Origin and Etymology of opal

Latin opalus, from Greek opallios, ultimately from Sanskrit upala stone, jewel


First Known Use: circa 1586


OPAL Defined for English Language Learners

opal

play
noun \ˈō-pəl\

Definition of opal for English Language Learners

  • : a white or clear stone that reflects changing colors and that is used in jewelry


OPAL Defined for Kids

opal

play
noun \ˈō-pəl\

Definition of opal for Students

  1. :  a mineral with soft changeable colors that is used as a gem


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