par·a·si·tol·o·gy
ˌper-ə-sə-ˈtä-lə-jē 
-ˌsī-,
ˌpa-rə-
: a branch of biology dealing with parasites and parasitism especially among animals
parasitological
adjective
or less commonly parasitologic
par·a·si·to·log·i·cal
variants
or less commonly parasitologic
: of or relating to parasitology
Examples of parasitology in a Sentence
Recent Examples on the Web
Kristen Rogers, CNN Money, 10 Jan. 2026
That’s a problem given the more immediate threats facing parasitology: climate change and habitat loss.
—Hannah Richter, Smithsonian Magazine, 31 July 2024
That’s where professor Adler R. Dillman, chair of UC Riverside’s Department of Nematology (study of roundworms) and an expert on parasitology, and a team of researchers and students recently unmasked their culprit.
—Andrew J. Campa, Los Angeles Times, 14 Mar. 2024
Kaplan, a professor of parasitology and himself a victim of amebic dysentery and 8-inch roundworms, gives a raucous crash course that blends surprising biology with macabre stories.
—Andrew Moseman, Discover Magazine, 6 May 2023
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Noun
Acanthamoeba, a single-cell organism that doesn’t need a host to survive and is commonly found in water and soil sources, is one of many pathogens or microbes that can cause keratitis, said Dr. Jacob Lorenzo-Morales, professor of parasitology at the University of La Laguna in Spain, via email.
—Kristen Rogers, CNN Money, 10 Jan. 2026
That’s a problem given the more immediate threats facing parasitology: climate change and habitat loss.
—Hannah Richter, Smithsonian Magazine, 31 July 2024
That’s where professor Adler R. Dillman, chair of UC Riverside’s Department of Nematology (study of roundworms) and an expert on parasitology, and a team of researchers and students recently unmasked their culprit.
—Andrew J. Campa, Los Angeles Times, 14 Mar. 2024
Kaplan, a professor of parasitology and himself a victim of amebic dysentery and 8-inch roundworms, gives a raucous crash course that blends surprising biology with macabre stories.
—Andrew Moseman, Discover Magazine, 6 May 2023
Cite this Entry
“Parasitology.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/parasitology. Accessed 25 Jun. 2026.
Copy CitationMedical Definition
parasitology
noun
par·a·si·tol·o·gy
ˌpar-ə-sə-ˈtäl-ə-jē
-ˌsīt-ˈäl-
-ˌsīt-ˈäl-
plural parasitologies
: a branch of biology dealing with parasites and parasitism especially among animals
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