Adj. 1. patrilineal-based on or tracing descent through the male line; a patrilineal society. patrilinear. lineal, direct-in a straight unbroken line of descent from parent to child; lineal ancestors; lineal heirs; a direct descendant of the king; direct heredity.Translations.. patrilineal-based on or tracing descent through the male line; a patrilineal society. patrilinear. lineal, direct-in a straight unbroken line of descent from parent to child; lineal ancestors; lineal heirs; a direct descendant of the king; direct heredity. Translations.
Also called leukocytes, white blood cells play an important role in the immune system by identifying, destroying, and removing pathogens, damaged cells, cancerous cells, and foreign matter from the body. Leukocytes originate from bone marrow stem cells and circulate in blood and lymph fluid.
1 White blood cell (WBC, leukocyte) count. 2  White blood cells protect the body against infection. 3  If an infection develops, white blood cells attack and destroy the bacteria, virus, or other organism causing it. 4  White blood cells are bigger than red blood cells but fewer in number. CBC test usually includes: 1  White blood cell (WBC, leukocyte) count. 2  White blood cells protect the body against infection. 3  If an infection develops, white blood cells attack and destroy the bacteria, virus, or other organism causing it. 4  White blood cells are bigger than red blood cells but fewer in number.