Go to MSN Homeencarta®
Dictionary
Find
in
Dictionary
Thesaurus
Translations
ABCDEFGHIJKLMNOPQRSTUVWXYZ
Click to move up the list of words
op.
op art
op. cit.
op-ed
op shop
opacify
opacity
opah
opal
opalesce
opalescent
opaline
opaque
opaque projector
ope
OPEC
Opelousas
Click to move down the list of words
Also available:

World English Dictionary
Dictionnaire Français

opal
o·pal [ ṓp'l ]


noun 
Definition:
 
noncrystalline silica: a variously colored semiprecious stone that is a noncrystalline variety of silica. Use: gems.
[Late 16th century. Directly or via French< Latin opalus]
Encarta® World English Dictionary [North American Edition] © & (P)2009 Microsoft Corporation. All rights reserved. Developed for Microsoft by Bloomsbury Publishing Plc.
Advertisement
© 2009 Microsoft