Definition

1. Noun:
   • Foul-smelling gas that forms in sewers: "Sewer gas" refers to the complex mixture of toxic and non-toxic gases produced by the decomposition of organic waste in sewer systems. It is characterized by a strong, unpleasant odor.

Usage

• The term "sewer gas" is used as a compound noun. It is typically non-countable and describes the gaseous mixture as a whole.
• It is commonly used in contexts related to public health, plumbing, building maintenance, and environmental concerns.

Examples

• Noun:
  • A strong smell of sewer gas was detected in the basement, indicating a possible pipe leak.
  • Proper venting is essential to prevent the buildup of dangerous sewer gas in the home.
  • Exposure to high concentrations of sewer gas can cause headaches and nausea.

Advanced Usage

• "sewer gas" as a hazard: The term is often used to denote a specific environmental and health hazard within buildings or urban infrastructure.
  • The investigation concluded that the cause of the illness was chronic exposure to sewer gas.

Variants and Related Words

• Sewer (n): An underground conduit for carrying off drainage water and waste matter.
• Gas (n): An air-like fluid substance which expands freely to fill any space available, irrespective of its quantity.

Synonyms

• Foul air (from drains/sewers): A less technical synonym emphasizing the unpleasant smell.
• Effluvium: A formal or literary term for an unpleasant or harmful odor or discharge.

Notes

• "Sewer gas" is a specific technical term. It is not typically used in idioms or phrasal verbs.
• The primary components of sewer gas can include methane, hydrogen sulfide, ammonia, and carbon dioxide.

Noun

1. foul-smelling gas that forms in sewers