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. [ 1913 Webster ]

n. [ Organo- + genesis. ] 1. (Biol.) The origin and development of organs in animals and plants. [ 1913 Webster ]

2. (Biol.) The germ history of the organs and systems of organs, -- a branch of morphogeny. Haeckel. [ 1913 Webster ]

a. (Biol.) Of or pertaining to organogenesis. [ 1913 Webster ]

n. (Biol.) Organogenesis. [ 1913 Webster ]