bacterium

As nouns the difference between thallus and bacterium

is that thallus is (botany) an undifferentiated plant body, such as in algae while bacterium is (microbiology) a single celled organism with no nucleus.

As nouns the difference between bacterium and protozoan

is that bacterium is (microbiology) a single celled organism with no nucleus while protozoan is (cytology) any of the diverse group of eukaryotes, of the phylum protozoa, that are primarily unicellular, existing singly or aggregating into colonies, are usually nonphotosynthetic, and are often classified further into phyla according to their capacity for and means of motility, as by pseudopods, flagella, or cilia.

As an adjective protozoan is

of, pertaining to, or characteristic of a protozoan.

As a proper noun bactria

is (greek name for ancient country).

As a noun bacterium is

(microbiology) a single celled organism with no nucleus.

As nouns the difference between bacterium and spirogyra

is that bacterium is (microbiology) a single celled organism with no nucleus while spirogyra is any of a group of freshwater, filamentous green algae, of the genus , having chloroplasts arranged in spirals.

As a verb enzyme

is .

As a noun bacterium is

(microbiology) a single celled organism with no nucleus.

As nouns the difference between bacterium and bacteriophage

is that bacterium is (microbiology) a single celled organism with no nucleus while bacteriophage is bacteriophage.

As an adjective bacteriophage is

bacteriophagous.

As nouns the difference between phage and bacterium

is that phage is (microbiology|virology) a virus that is parasitic on bacteria while bacterium is (microbiology) a single celled organism with no nucleus.

As nouns the difference between taxonomy and bacterium

is that taxonomy is the science or the technique used to make a classification while bacterium is (microbiology) a single celled organism with no nucleus.

As nouns the difference between bacterium and meningococcemia

is that bacterium is (microbiology) a single celled organism with no nucleus while meningococcemia is meningococcal septicemia, a form of sepsis caused by the bacterium.

As nouns the difference between bacterium and bacteriotropin

is that bacterium is (microbiology) a single celled organism with no nucleus while bacteriotropin is an antibody that makes a specific bacterium more susceptible to phagocytosis.