| the branch of medical science that studies the body's immune system | inherent resemblance between persons or things |
| | a natural attraction or feeling of kinship |
| | the force attracting atoms to each other and binding them together in a molecule |
| | (immunology) the attraction between an antigen and an antibody |
| | (anthropology) kinship by marriage or adoption; not a blood relationship |
| | (biology) state of relationship between organisms or groups of organisms resulting in resemblance in structure or structural parts |
| | a close connection marked by community of interests or similarity in nature or character |