Definition

Noun: 1. A vessel or apparatus used for the controlled decomposition or breakdown of organic materials: Specifically, a digester is a type of sealed container, often an autoclave, in which substances (like plant or animal matter) are subjected to heat, pressure, and sometimes chemicals or microorganisms to break them down into simpler components. This process is called digestion. 2. (Archaic) A person or thing that digests: Historically, it could refer to a person with a particular capacity for digestion or a substance that aids digestion.

Examples

• Noun:
  • The wastewater treatment plant uses a large anaerobic digester to process sewage sludge.
  • In the laboratory, they placed the sample in a digester to prepare it for analysis.
  • (Archaic) He considered himself a strong digester, able to eat anything without issue.

Advanced Usage

• "Anaerobic digester": A specific type of digester that breaks down organic material in the absence of oxygen, often used to produce biogas (methane).
  • The farm installed an anaerobic digester to manage manure and generate electricity.
• "Pressure digester": A digester that uses high pressure to accelerate the digestion process.
  • The chemical sample was dissolved using a pressure digester.

Variants and Related Words

• Digest (verb): To break down food or other substances in the body or in a machine.
• Digestion (noun): The process of digesting.
• Digestive (adjective): Relating to or aiding digestion.

Synonyms

• Decomposition vessel
• Autoclave (in specific technical contexts)
• Bioreactor (in a broader biological context)
• Decomposer (as a functional synonym, though not a machine)

Notes on Different Meanings

The primary modern meaning is a machine or vessel. The archaic meaning referring to a person is now very rare and would likely not be understood in most contemporary contexts without clarification.

Noun

1. autoclave consisting of a vessel in which plant or animal materials are digested