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Microbiology Key Terms and Definitions

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  • disinfectant

    An antimicrobial chemical used on non-living surfaces.

  • cilia

    Eukaryotic protein filaments surrounding some Protozoa.

  • virus

    An acellular pathogenic microorganism.

  • simple microscope

    Contains one magnifying lens.

  • colony

    A visible mass of microbial growth on a nutrient surface.

  • archaea

    A prokaryotic domain of life related to eukaryotes.

  • enzymes

    Proteins which catalyze the steps in metabolic pathways.

  • pathogen

    A term describing disease-causing bacteria and viruses.

  • animalcules

    Early name for microscopic life forms.

  • broth

    A solution of nutrients which supports microbial growth.

  • parasite

    A term reserved for disease-causing protozoa and worms.

  • antibiotics

    Penicillin was the first compound discovered by Fleming.

  • sterile

    100% devoid of all life.

  • molds

    Filamentous fungi which often produce spores.

  • antiseptic

    An antimicrobial chemical used on living tissue.