</a> Courtesy Smithsonian Institution National Numismatic Collection. Rare Currency at The Smithsonian The previous coin's older brother the 1849, Gold Rush era double eagle gold coin is valued by collectors the world over. It was the United States of America's first $20 denominational gold coin. Courtesy Smithsonian Institution National Numismatic Collection.
subspecies - (biology) a taxonomic group that is a division of a species; usually arises as a consequence of geographical isolation within a species. race. biological science, biology - the science that studies living organisms. taxon, taxonomic category, taxonomic group - animal or plant group having natural relations.
Variation. Definition. noun, plural: variations. (1) A difference or deviation (e.g. in structure, form, function) from the recognized norm or standard. (2) A modification in structure, form or function in an organism, deviating from other organisms of the same species or group.ariation. Definition. noun, plural: variations. (1) A difference or deviation (e.g. in structure, form, function) from the recognized norm or standard. (2) A modification in structure, form or function in an organism, deviating from other organisms of the same species or group.