皮浪主义，或皮浪怀疑主义见于2世纪末3世纪初时塞克斯都·恩披里柯著作《皮朗主义纲要》（Πυῤῥώνειοι ὑποτύπωσεις，Outlines of Pyrrhonism），为前1世纪时埃奈西德穆的怀疑论学派，可追溯至古希腊哲学家皮浪（约前360年－约前270年）。

Pyrrhonism, or Pyrrhonian skepticism, was a school of skepticism founded by Aenesidemus in the 1st century BCE and recorded by Sextus Empiricus in the late 2nd century or early 3rd century CE. It was named after Pyrrho, a philosopher who lived from c. 360 to c. 270 BCE, although the relationship between the philosophy of the school and that of the historical figure is unclear. A revival of the use of the term occurred during the 17th century.