Definition

1. Noun:
   • An organism, especially a bacterium, that requires air or free oxygen for life and growth. Aerobes cannot survive in environments without oxygen.

Usage

• The term "aerobe" is used primarily in scientific contexts, especially in biology, microbiology, and medicine, to classify organisms based on their oxygen requirements.
• It is a countable noun (e.g., an aerobe, many aerobes).

Examples

• Noun:
  • Most animals are obligate aerobes, needing oxygen to produce energy.
  • The lab culture confirmed the presence of an aerobe in the sample.
  • This particular aerobe thrives in well-oxygenated water.

Advanced Usage

• "Obligate aerobe": An organism that requires oxygen for cellular respiration and cannot grow without it.
  • Mycobacterium tuberculosis is an obligate aerobe.
• "Facultative aerobe": An organism that can use oxygen for growth but can also switch to fermentation or anaerobic respiration in its absence. (Note: This is more commonly termed a "facultative anaerobe," but the concept of a facultative relationship to oxygen is relevant.)
  • E. coli is often described as a facultative anaerobe, meaning it can live with or without oxygen.

Variants and Related Words

• Aerobic (adj): Relating to, involving, or requiring free oxygen.
  • Aerobic exercise improves cardiovascular health.
• Aerobically (adv): In an aerobic manner.
  • The bacteria grew aerobically in the incubator.
• Aerobiosis (n): Life sustained in the presence of air or oxygen.
  • The process of aerobiosis is essential for these microbes.

Synonyms

• Oxygen-dependent organism: An organism that requires oxygen.
• Aerobic organism: Another term for an aerobe.

Antonyms

• Anaerobe (n): An organism that does not require oxygen for growth and may even die in its presence.
  • Clostridium botulinum is a dangerous anaerobe.

Noun

1. an organism (especially a bacterium) that requires air or free oxygen for life