organo

Organo is a term with several meanings in different domains. In chemistry, organo- is a prefix used to describe compounds that contain carbon atoms bonded to a metal or metalloid, forming organometallic or organocatalytic species. This usage covers a broad range of substances, including organomagnesium reagents (Grignard reagents), organolithium compounds, and related carbon–metal derivatives such as organozinc or organopalladium compounds. The organo- designation signals carbon-based ligands attached to a metal center and is common in inorganic chemistry, catalysis, and materials science.

In Italian, organo means organ in the sense of a bodily organ or a pipe organ. The term is also used metaphorically to denote an official organ of an organization or government, a body or publication that represents the group, as in expressions such as organo ufficiale or organo di informazione.

Beyond science and language, organo can appear as a proper noun in some names. As a surname or as part of place names in certain language communities, it may occur but is not a common geographic term. In general usage, the word carries these distinct senses—chemical nomenclature, linguistic meaning related to organs, and references to organizational or official publications.