biomass

noun

bio·​mass ˈbī-ō-ˌmas 

1

: the amount of living matter (as in a unit area or volume of habitat)

2

: plant materials and animal waste used especially as a source of fuel

Examples of biomass in a Sentence

Recent Examples on the Web

And the algicide attempts may not have worked because the biomass of blue-green algae was just too large for effects to be detected. —Keith Matheny, Freep.com, 8 Sep. 2025

The probe relates to statements made about its biomass sourcing between January 2022 and March 2024, and the compliance of its 2021, 2022 and 2023 annual reports with listing, disclosure and transparency rules. —Jenni Reid, CNBC, 28 Aug. 2025

The Viking, a pilot biomass gasifier at the Technical University of Denmark, sets the global benchmark for thermal gasification. —Erik Kobayashi-Solomon, Forbes.com, 28 Aug. 2025

Dripping from ceilings, oozing from biomasses, coating the Xenomorphs’ many mouths. —Noel Murray, Vulture, 20 Aug. 2025

Word History

First Known Use

1931, in the meaning defined at sense 1

Kids Definition

biomass

noun

bio·​mass

ˈbī-ō-ˌmas

1

: the amount of living matter (as in an area or volume of habitat)

2

: plant materials and animal waste used especially as a source of fuel

Medical Definition

biomass

noun

bio·​mass -ˌmas 

: the amount of living matter (as in a unit area or volume of habitat)