- mud consisting chiefly of decomposed organic matter formed at the bottom of a stagnant sea or lake.
Origin of sapropel
1905–10; sapro- + -pel < Greek pēlós mud
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
- an unconsolidated sludge consisting of the decomposed remains of aquatic organisms, esp algae, that accumulates at the bottoms of lakes and oceans
C20: from sapro- + -pel from Greek pēlos mud
- An unconsolidated ooze consisting mainly of putrefied plant remains and found in anaerobic areas at the bottom of swamps, lakes, and shallow seas.