In addition to the proteins (agglutinogens) existing on your red blood cells, other genes make proteins called agglutinins (a-GLOO-tin-ins) that circulate in your blood plasma. Agglutinins are responsible for ensuring that only the blood cells of your blood type exist in your body.
Older children and teens are unlikely to start calling a stepmom mom or mother partly because of their fear of disloyalty to their biological mom. It is vital for all parties involved -- biological parents and stepmom -- to support their child's choice of what to call the stepmom.
1. countable noun. Your mother is the woman who gave birth to you. You can also call someone your mother if she brings you up as if she was this woman. You can call your mother 'Mother'. She sat on the edge of her mother's bed. She's an English teacher and a mother of two children. [+ of] Mother and child form a close attachment.