</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.
Definition of brood. 1 : the young of an animal or a family of young; especially : the young (as of a bird or insect) hatched or cared for at one time a hen with her brood of chicks. 2 : a group having a common nature or origin the entire brood of chronicle plays â T. S. Eliot.