外道十一宗之一。以口譬太虛。謂萬物本為由一虛而生者。中論疏三本曰：「口力外道，計太虛能生四大，四大能生藥草，藥草能生眾生，此從無生也。」參照口力論師項。
One of the eleven heretical sects of India. which is said to have compared the mouth to the great void out of which all things were produced. The great void produced the four elements, these produced herbs, and these in turn all the living; or more in detail the void produced wind, wind fire, fire warmth, warmth water, water congealed and formed earth which produced herbs, herbs cereals and life, hence life is food; ultimately all returns to the void, which is nirvana.