1. Plural of gregarine; parasitic protozoans of the order Gregarinida, typically found in the intestines of invertebrates.
Usage: biology; technical; plural form

Examples

• Gregarines are single-celled parasites commonly studied in invertebrate biology.
• The researcher observed gregarines under the microscope in the insect's digestive tract.
• Gregarines form characteristic associations called syzygy during their life cycle.
• Many insects harbor gregarines without showing obvious signs of infection.