1. a spherical bacterium
Usage: biology
2. a scale insect
Usage: entomology

Examples

• Streptococcus is a genus of coccus bacteria that can cause infections.
• The laboratory identified several types of coccus under the microscope.
• Pneumococcus is a dangerous coccus that causes pneumonia.
• The coccus insects were damaging the citrus trees.
• Researchers studied the cell wall structure of the coccus.
• The cochineal coccus produces a red dye used in food coloring.