science

4. he branch of science that deals with microorganisms.
6. a substance used to stimulate the production of antibodies and provide immunity against one or several diseases, prepared from the causative agent of a disease, its products, or a synthetic substitute, treated to act as an antigen without inducing the disease.
7. all the inhabitants of a particular town, area, or country
8. plural form of fungus.
10. an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
11. a widespread occurrence of an infectious disease in a community at a particular time.
12. a disorder of structure or function in a human, animal, or plant, esp. one that produces specific signs or symptoms or that affects a specific location and is not simply a direct result of physical injury.
13. a microorganism, esp. a bacterium causing disease or fermentation.

1. an organism that lives in or on another organism (its host) and benefits by deriving nutrients at the host's expense.
2. reproductive unit capable of giving rise to a new individual without sexual fusion, characteristic of lower plants, fungi, and protozoans.
3. conditions or practices conducive to maintaining health and preventing disease, esp. through cleanliness.
5. the refusal to accept or comply with something; the attempt to prevent something by action or argument.
9. plural form of bacterium.
10. quantity having direction as well as magnitude, esp. as determining the position of one point in space relative to another.