Antibody and Micro-organism

Antibody noun - Any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response.

Micro-organism and antibody are semantically related In some cases you can replace phrase "Micro-organism" with "Antibody", this terms are similar.

Micro-organism noun - Any organism of microscopic size.

Antibody and micro-organism are semantically related in microscopic organism topic. You can use "Antibody" instead a noun phrase "Micro-organism".