verb (used without object), bi·o·de·grad·ed, bi·o·de·grad·ing.
to decay and become absorbed by the environment: toys that will biodegrade when they're discarded.
Origin of biodegrade
First recorded in 1970–75; back formation from biodegradable
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.