1. Organisms, especially bacteria or fungi, that thrive in acidic environments with a pH below 7.
Usage: plural form; used in biology and microbiology; also called acidophilic organisms
2. Cells or tissues that stain readily with acidic dyes, particularly in histology.
Usage: technical; used in pathology and microscopy

Examples

• Acidophiles are commonly found in mine drainage and hot springs.
• Some acidophiles can survive in environments with a pH as low as 1.
• Certain bacteria are acidophiles that help break down organic matter in acidic soils.
• The pituitary gland contains acidophiles that produce growth hormone.
• Acidophiles in the stomach lining secrete hydrochloric acid.
• Researchers study acidophiles to understand how life adapts to extreme conditions.