Algicides or algaecides: These are microbial control products used for reducing or preventing the growth of algae.

Antifouling paint or bottom paint: This is a specialized coating applied to the hull of a ship or boat to slow the growth of subaquatic organisms that attach to the hull and can affect a vessel's performance and durability.

Antimicrobials: This is another name for microbial control products, often used interchangeably with biocides.

Bacteria: Bacteria constitute a large domain of prokaryotic microorganisms. Typically a few micrometers in length, bacteria have a number of shapes, ranging from spheres to rods and spirals. Bacteria were among the first life forms to appear on earth and are present in most of its habitats. (See also microorganisms below.)

Biocides: Biocides are chemicals or agents capable of killing or inactivating microorganisms. This term is often used interchangeably with biocides or antimicrobials.

Biofouling or biological fouling: Biofouling is the accumulation of microorganisms, plants, algae or animals on wetted surfaces. Such accumulation is referred to as epibiosis when the host surface is another organism and the relationship is not parasitic. For more information please see Wikipedia.

Cefic: Cefic is the European Chemicals Industry Council, based in Brussels, Belgium. Please see Cefic webpage.

Chlorination: This is the process of adding chlorine (Cl2) or hypochlorite to water. Chlorination is used to kill certain bacteria and other microbes. In particular, chlorination is used to prevent the spread of waterborne diseases such as cholera, dysentery, jaundice and typhoid.

Disinfectant: Disinfectants are microbial control agents that are applied to non-living objects to destroy microorganisms living on them. For more detailed information, please refer to the Wikipedia article on disinfectant.

Ebola: Ebola virus disease (EVD), formerly known as Ebola hemorrhagic fever, is a severe, often fatal illness in humans. Please see Microbial Control helped fight the spread of Ebola

Legionella pneumophila: This is the bacterium that causes Legionnaires’ disease, a serious sometimes lethal pneumonia. Please see  Control of Legionella in Cooling Towers

Marine Organisms: Marine organisms may be classified (according to their mode of life) as nektonic, planktonic or benthic. Nektonic animals are those that swim and migrate freely, such as fish. Planktonic organisms, usually very small or microscopic, have little or no power of locomotion and merely drift or float in the water. Benthic organisms live on the sea bottom and include sessile forms such as sponges, oysters and corals; creeping organisms such as crabs and snails; and burrowing species such as clams and worms.

MCEC: The Microbial Control Executive Committee is a sector group of Cefic, the European Chemicals Industry Council. Membership consists of the world’s leading microbial control technology and solutions producers

Microbes: This is a short form for microorganisms (please see below).

Microbial Control Information Center: The MCIC is an initiative of the Microbial Control Executive Committee, a sector group of Cefic, the European Chemicals Industry Council. The MCIC has been established to provide information on microbial control and to showcase some of the innovative solutions that the industry has developed.

Microbiologically Induced Corrosion: This is corrosion caused by microbes.

Microorganisms: These are microscopic living organisms, which may be single or multicellular. They are very diverse and include all the bacteria and archaea, and almost all the protozoa. Microorganisms also include some fungi, algae and certain animals, such as rotifers. Some microbiologists also classify viruses (and viroids) as microorganisms. Microorganisms live in every part of the biosphere.

Mold: Mold is a fungus that grows in the form of multicellular filaments called hyphae. In contrast, fungi that can adopt a single celled growth habit are called yeasts.

Norovirus: Norovirus is the most common cause of viral gastroenteritis in humans. The virus is transmitted by contaminated food or water, by person-to-person contact and via contamination of surfaces. The virus affects around 267 million people and causes over 200,000 deaths each year. Please see Wikipedia for more information

Pathogens: A pathogen in the broadest sense is anything that can produce disease. Typically the term is used to describe an infectious agent such as a virus, bacterium, prion, fungus or parasite that causes disease in its host.

Reservoir-souring: This is the phenomenon in which there is an increase of mass of hydrogen sulfide (H2S) per unit mass of total produced fluids due to activities of sulfate reducing bacteria (SRB) as a result of waterflood.

Solvents: A solvent is a substance that dissolves a solute (a chemically different liquid, solid or gas), resulting in a solution. A solvent is usually a liquid but can also be a solid or a gas.

SRB - Sulfate Reducing Bacteria: SRB are bacteria that can obtain energy by oxidizing organic compounds or molecular hydrogen (H2) while reducing sulfate to hydrogen sulfide (H2S), an extremely toxic and corrosive gas (see the section on corrosion).

Workover Fluids: The term workover is used to refer to any kind of oil well intervention involving invasive techniques, such as wireline, coiled tubing or snubbing. More specifically, though, workover often refers to the expensive process of pulling and replacing a completion.