# aspergillus

/ɐspˈɜːɡɪləs/ (UK) · CEFR C2 · Noun

Source: https://englishreference.com/word/aspergillus
Updated: 2026-10-19

## Definition

a common type of mold that grows on old food, soil, and damp walls. Some kinds can make you sick if you breathe in a lot of it.

For teachers: a genus of filamentous fungi widespread in soil, decaying vegetation, and indoor environments, including several species that cause food spoilage and respiratory infection.

## Examples

- Aspergillus often grows on old bread.
- The lab found Aspergillus in the damp basement after testing the air quality.
- Researchers traced the hospital outbreak to Aspergillus spores circulating through the aging ventilation system during renovation work.

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