Definition of Opal
O´pal
n.
1.
(Min.)
A
mineral
consisting
,
like
quartz
,
of
silica
,
but
inferior
to
quartz
in
hardness
and
specific
gravity
.
Related Words
black
opal
,
fire
opal
,
girasol
,
harlequin
opal
,
mineral
,
opalise
,
opalize
,
opaque
gem
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Oosperm
Oosphere
Oosporangium
Oospore
Oosporic
Oostegite
Ootheca
Ooticoid
Ootype
Ooze
Ooze leather
oozing
Oozoa
Oozy
Opacate
Opacity
Opacous
Opacular
Opah
Opake
Opalesce
Opalescence
Opalescent
Opaline
Opalize
Opalotype
Opaque
Opaqueness
Ope
Opeidoscope
Opelet
Open
Open chain
Open circuit
Open communion
Open diapason
Open door
Open flank
Open harmony
Open hawse
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