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Freebase(0.00 / 0 votes)Rate this definition: Bioturbation is the reworking of soils and sediments by animals or plants. Its effects include changing texture of sediments, bioirrigation and displacement of microorganisms and non-living particles.
1 To disturb; to bother or unsettle. ( 2 physics) To slightly modify the motion of an object. ( 3 astronomy) To modify the motion of a body by exerting a gravitational force. ( 4 mathematics) To modify slightly, such as an equation or value. 5  perturbation. 6  perturbative. 7  perturbed.  perturbedly.