The skin is the largest organ of the human body and of all mammals. In the average adult it weighs around six pounds, which is nearly twice the weight of the human brain or liâ¦ver. Internally, the largest organ is the liver which weighs around 1.6 pounds. A curmudgeon with years of practice.
n. pl. species. 1. Biology A group of closely related organisms that are very similar to each other and are usually capable of interbreeding and producing fertile offspring. The species is the fundamental category of taxonomic classification, ranking below a genus or subgenus.. pl. species. 1. Biology A group of closely related organisms that are very similar to each other and are usually capable of interbreeding and producing fertile offspring. The species is the fundamental category of taxonomic classification, ranking below a genus or subgenus.
noun. They are all of the same species. They are all of the same species. The definition of a species is a group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner. An example of a species is all human beings.oun. They are all of the same species. They are all of the same species. The definition of a species is a group of animals, plants or other living things that all share common characteristics and that are all classified as alike in some manner. An example of a species is all human beings.