Chironomia is the art of using gesticulations or hand gestures to good effect in traditional rhetoric

Rhetoric

Rhetoric is the art of discourse, an art that aims to improve the facility of speakers or writers who attempt to inform, persuade, or motivate particular audiences in specific situations. As a subject of formal study and a productive civic practice, rhetoric has played a central role in the Western...

 or oratory

Oratory

Oratory is a type of public speaking.Oratory may also refer to:* Oratory , a power metal band* Oratory , a place of worship* a religious order such as** Oratory of Saint Philip Neri ** Oratory of Jesus...

. Effective use of the hands, with or without the use of the voice, is a practice of great antiquity, which was developed and systematized by the Greeks and the Romans. Various gestures had conventionalized meanings which were commonly understood, either within certain class or professional groups, or broadly among dramatic and oratorical audiences.

Gilbert Austin

Gilbert Austin

Gilbert Austin was an Irish educator, clergyman, and author. Austin is best known for his 1806 book on chironomia, Chironomia, or a Treatise on Rhetorical Delivery. Heavily influenced by classical writers, Austin stressed the importance of voice and gesture to a successful oration.-Biographical...

was a well-known author on chironomia. The article about him contains a summary of theories in chironomia.