Opal

Proper noun

 * 1)  from the precious stone, invented in the nineteenth century.
 * 2)  A type of petrol made by  designed to be unable to be used for petrol sniffing.
 * 1)  A type of petrol made by  designed to be unable to be used for petrol sniffing.

Etymology
From, from.

Etymology
From, from , from.

Noun

 * 1) opal