1. White blood cells; cells in the blood that help the body fight infection and disease.
Usage: Plural form of leukocyte; Medical/scientific term; Also spelled leucocytes in British English

Examples

• The doctor ordered a blood test to count the patient's leukocytes.
• Leukocytes are essential for protecting the body against bacterial infections.
• A high number of leukocytes in the blood can indicate an infection or illness.
• Different types of leukocytes, such as neutrophils and lymphocytes, have different roles in immunity.
• The immune system produces more leukocytes when the body is fighting off a virus.
• Leukocytes make up about 1% of the total blood volume in a healthy person.