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English Dictionary - With Multi-Lingual Search Definitions isomer noun  (chemistry) Any of two or more compounds with the same molecular formula but with different structure. (physics) Any of two or more nuclei with the same mass number and atomic number but with different radioactive properties. Etymology: From Ancient Greek (polytonic, á-) "iso-" + (polytonic, ) "part".      Full Definition of isomer  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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