en·​do·​par·​a·​site ˌen-dō-ˈper-ə-ˌsīt How to pronounce endoparasite (audio)
: a parasite that lives in the internal organs or tissues of its host
endoparasitic adjective
ˌen-dō-ˈper-ə-ˌsī-ˌti-zəm How to pronounce endoparasite (audio)

Example Sentences

Recent Examples on the Web On the right side of the whale, a scientist cutting through flesh pulls out worm-like endoparasites—those would be parasites that live inside their host, common for a whale—and puts them in a plastic baggy. Matt Simon, WIRED, 31 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'endoparasite.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

Word History


International Scientific Vocabulary

First Known Use

circa 1882, in the meaning defined above

Time Traveler
The first known use of endoparasite was circa 1882

Dictionary Entries Near endoparasite

Cite this Entry

“Endoparasite.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/endoparasite. Accessed 2 Feb. 2023.

Medical Definition


en·​do·​par·​a·​site -ˈpar-ə-ˌsīt How to pronounce endoparasite (audio)
: a parasite that lives in the internal organs or tissues of its host compare ectoparasite
endoparasitic adjective
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

Words Named After People

  • name tags
  • Namesake of the leotard, Jules Léotard had what profession?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Solve today's spelling word game by finding as many words as you can with using just 7 letters. Longer words score more points.

Can you make 12 words with 7 letters?