Symbiopsychotaxiplasm: Take One is a 1968 American experimental documentary film written, directed, co-produced and edited by filmmaker and documentarian William Greaves. The film is shot and presented in the style of a cinéma vérité documentary, attempting to capture and examine pure reality unhindered by the presence of the cameras all around. It is notable for the inherent layers of metatextual storytelling, with a documentary inside a documentary inside a documentary.

In 2015, Symbiopsychotaxiplasm was selected by the United States Library of Congress for preservation in the National Film Registry, deeming it "culturally, historically, or aesthetically significant."