OPAL

Pronunciation (US): (GB):

Meaning:

A translucent mineral consisting of hydrated silica of variable color; some varieties are used as gemstones

Classified under:

Nouns denoting substances

Hypernyms ("opal" is a kind of...):

mineral (solid homogeneous inorganic substances occurring in nature having a definite chemical composition)

opaque gem (a gemstone that is opaque)

Hyponyms (each of the following is a kind of "opal"):

black opal (a dark colored opal with internal reflections of green or red)

fire opal; girasol (an opal with flaming orange and yellow and red colors)

harlequin opal (a reddish opal with small patches of brilliant color)

Derivation:

opalize (replace or convert into opal)

opalize (make opalescent)