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English Dictionary - With Multi-Lingual Search Your Query of 'Opal' Resulted in 2 Matches Displaying Items 1 through 2 Definitions Opal proper noun  (given name, female) from the precious stone, invented in the nineteenth century. A type of petrol made by the BP company designed to be unable to used for petrol sniffing. (Reference: BP article on Opal http://www.bp.com/sectiongenericarticle.do?categoryId=9008933&contentId=7016884.)       opal noun  (mineralogy) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity. (biology), (genetics), (biochemistry) A colloquial name used in molecular biology referring to a particular stop codon sequence, "UGA." Translations:  French: opale Spanish: ópalo Etymology: In Florio's A World of Words 1598 as opale, from French opale or opalle, from Latin opalus, probably from Greek á (opallios), maybe from Sanskrit upala-s "gem" or "opal".<ref>Chambers Dictionary of Etymology, Robert K. Barnhart (ed.), Chambers, 1988</ref>        Find:   Words Starting With:   Words Ending With:   Words Containing:   Words That Match:    Translate Into:    Dutch   French   German    Italian   Spanish     Show 51015202550 results per page. Enter your search terms Submit search form   Web www.allwords.com Browse the Dictionary A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

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