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protozoan

protozoan

2 7.9
A very small single-celled organism often found in water or soil that can cause disease
  • noun
  • /ˌproʊtəˈzoʊən/
  • Specialized
translation icon : protozoo
  • Unlike these other protozoans, however, L. clarki is far from defenseless.
  • protozoan parasite
  • protozoan infection
  • parasitic protozoans

Examples

  • Chagas disease is caused by the protozoan parasite Trypanosoma cruzi, and insect members of the subfamily Triatominae are intermediate hosts.

    Academic text (2016)
  • In tropical regions, certain protozoans can cause diseases in humans and animals.

  • The spore-forming protozoan has been studied for years, but much remains to be learned about it.

    Academic text (2005)
  • Cyclospora is a protozoan parasite that causes infections in the summer.

    Academic text (2012)
  • The result: 85 to 90 percent of the colonies died after being infected with the biocontrol protozoan.

    Academic text (1994)
  • Toxoplasmosis is a protozoan infection caused by the parasite Toxoplasma gondii.

    Academic text (2006)
  • Human babesiosis is an emerging tick-borne disease caused by the intraerythrocytic protozoan Babesia microti.

    Academic text (2014)
  • The scientist studied the protozoan under a microscope to understand its structure.

  • In the food chain, protozoans serve as an important food source for larger organisms.

Synonyms

protozoa
vsprotozoan
  • Specialized
1 7.6

A tiny organism made of one cell that moves and eats small living things like an amoeba

is the singular organism rather than the whole group
protozoon
vsprotozoan
  • Specialized
9.9

A single-celled living thing usually too small to see without a microscope

is used similarly but emphasizes classification within the former animal group
animalculum
vsprotozoan
  • Archaic
9.9

A tiny living creature that you can see only with a microscope, like an amoeba

is the scientific modern term focused on single nonphotosynthetic unicells
animalcule
vsprotozoan
  • Archaic
9.9

A very small single-celled creature that you can see with a microscope, like an amoeba

is the scientific modern term rather than the older common name

Compounds

ciliated protozoan
  • Specialized
7.9

A single cell living thing that uses tiny hairs to move and eat

flagellate protozoan
  • Specialized
9.2

A single-cell creature that moves with tail-like parts and can cause disease in people

flagellated protozoan
  • Specialized
8.5

A one-celled organism that moves with whip-like tails and can cause disease in animals or people

Surface Forms

protozoan singular
protozoans plural

Etymology

The word protozoan comes from proto- 'first' and zoon 'animal', so it literally means 'first animal'. That's why a protozoan is a very small, single-celled 'animal', a simple creature often seen under a microscope.