What does entozoic mean?
Entozoic is a specialist adjective in zoology and parasitology for an organism that lives on or within another animal, especially an internal parasite. Its use is generally technical rather than everyday, and it emphasizes the organism’s relationship to its host rather than its taxonomic group. Thus, an entozoic organism is best understood as animal-dwelling, with the term commonly applied to parasites occupying the interior of a host. The word is useful because it places a life form within the established contrast between internal and external animal parasites, although “internal parasite” may be clearer in general writing. Entozoic should not be confused with ectozoic, which describes organisms living on the outside of a host, or with words beginning entom-, which normally refer to insects. In specialist prose, entozoic functions naturally as an attributive modifier: one may speak of an entozoic parasite, its life cycle, or an infection associated with entozoic forms.
adjectiveLiving on or within another animal, especially as an internal parasite; of or relating to such organisms.
- Living on or within another animal, especially as an internal parasite.
"The study traced an entozoic parasite through the digestive tract of its mammalian host."
"An entozoic parasite can complete part of its life cycle in a vertebrate host."
"The veterinary textbook classified the worm as entozoic because it developed within its host."
Entozoic points inward: its name identifies animal-dwelling parasites that live within their hosts.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of entozoic
Entozoic was formed within English from ento-, a combining form borrowed from Greek entos, meaning “in” or “within,” and -zoic, an English combining form associated with Greek zōē, meaning “animal” or “life,” and zōikos, meaning “of or pertaining to animals.” The construction was adopted for zoological terminology describing organisms inhabiting animals, especially internal parasites. It belongs to the same zoological word family as zoology, zoon, and zoic, but its ento- element is distinct from entomo-, the combining form associated with “insect.”
How entozoic is actually used
This is formal specialist terminology used chiefly in zoology, parasitology, veterinary science, and related biological writing. In general prose, “internal parasite” may be clearer.
Easily confused with entozoic
Entozoic describes organisms living on or within an animal, whereas ectozoic describes organisms living on its external surface.