biofilter
UK[ˈbaɪəʊˌfɪltə]US[ˈbaɪoʊˌfɪltər]
n
A filter that uses living material, especially microorganisms, to break down pollutants or purify air or water.
Morpheme Breakdown
bio
filter
bio
life
filter
device for purification
Etymology
The word 'biofilter' is a modern scientific compound, transparently constructed from two established English morphemes. The first element, 'bio-', originates from the Greek noun 'bios' (βίος), meaning 'life' or 'mode of life', which entered English as a productive combining form. The second element, 'filter', traces back to Medieval Latin 'filtrum', meaning 'felt', a porous material historically used for straining liquids. The compound term logically describes a filtration system whose core functional component is biological life, typically a community of microorganisms, which metabolizes and removes contaminants, contrasting with purely physical or chemical filters.
Analysis
Structure: bio (life) + filter (device for purification)
- bio: From Greek 'bios', meaning 'life'. In English, a combining form denoting life or living organisms.
- filter: From Medieval Latin 'filtrum', meaning 'felt' (used as a strainer). In English, a noun denoting a device or material for removing impurities.
Examples
The wastewater treatment plant uses a large biofilter to remove organic compounds.
A simple biofilter containing peat moss can help purify the air in the greenhouse.
The aquarium's health depends on the bacteria colonizing the biofilter in the tank.