a formal organization of people or groups of people

a formal organization of people or groups of people

a formal organization of people or groups of people

a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O

a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O

a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O

a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O

a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O

a classification system for the antigens of human blood; used in blood transfusion therapy; four groups are A and B and AB and O

tall coarse annual of Old World tropics widely cultivated in southern United States and West Indies for its long mucilaginous green pods used as basis for soups and stews; sometimes placed in genus Hibiscus