biomass UK /ˈbaɪə(ʊ)mæs/US /ˈbaɪoʊˌmæs/ noun3 •The total mass of a living thing or a part thereof (such as a cell).Since protein constitutes the majority of the biomass of a cell, building new protein is a major way that cells increase their size. — 2005 •Organic matter derived from living things that were recently alive (especially vegetation) used as a fuel or source of energy, especially if cultivated for that purpose; also, fuel produced from such organic matter; biofuel.Among the key contracts she works on is the supply of coal and biomass to Drax power station and extensive rail operations for British Steel. — 2020 •The total mass of all, or a specified category of, living things within a specific area, habitat, etc.In the untouched Shangri-la-like Kingman Reef in the Line Islands in the central Pacific, sharks make up 75 per cent of the fish biomass. — 2012 formsbiomasses
