小体论是一个物理学理论，该理论假定所有物质都是由微小颗粒组成，并且在17世纪扮演着重要角色。小体论领域中处于主要领导地位的科学家有皮埃尔·伽桑狄、罗伯特·波义耳和约翰·洛克。

Corpuscularianism is a physical theory that supposes all matter to be composed of minute particles. The theory became important in the seventeenth century; amongst the leading corpuscularians were Rene Descartes, Pierre Gassendi, Isaac Newton, Robert Boyle, and John Locke.