What is "organogen"

Organogen \Or*gan"o*gen\, n. [Organo- + -gen.] (Chem.) A name given to any one of the four elements, carbon, hydrogen, oxygen, and nitrogen, which are especially characteristic ingredients of organic compounds; also, by extension, to other elements sometimes found in the same connection; as sulphur, phosphorus, etc.

n. 1 (context chemistry dated English) Any of the four elements — carbon, hydrogen, oxygen, and nitrogen — that are especially characteristic of organic compounds. 2 (context chemistry dated English) Any of certain other elements sometimes found in organic compounds, such as sulphur and phosphorus.