ento-, ent-

(Greek: within, inside, inner; used as a prefix [used in many words related to anatomy and biology])

The evaluation and inspection of the transparency of the interiors of the eyes.
The semifluid, granular interior of certain unicellular organisms.
In corals, a septum developed interiorly.
A reference to the interior of the ear.
Within the tympanum (eardrum) of the ear.
entozoa (pl) (noun)
All the internal animal parasites as a group: The entozoa include tapeworms, flukes, nematodes, and roundworms, termed helminths, which thrive inside other animals.

The entozoa are considered to be an artificial group, containing all types of animals living parasitically in others.

entozoal (adjective) (not comparable)
Pertaining to internal animal parasites: Because Jane had pains in her abdomen, she went to see Dr. Thompson who examined her and finally was able to make the diagnosis as an endozoal disease which had to be treated immediately.
entozoic (adjective) (not comparable)
Concerning a lifeform living within the body of another animal or plant: Typically the roundworm is entozoic and thrives inside an animal as a parasite.

And an entozoic illness can be caused by trichina, a small slender nematode worm.

entozoon (s) (noun), entozoons; entozoa (pl)
A parasitic animal that lives within another animal: Entozoa can be trematodes that infest the internal organs, intestines, muscle, or tissues of other animals.

Cross references of word families related directly, or indirectly, to: "internal organs, entrails, inside": enter-; fistul-; incret-; inter-; intra-; splanchn-; viscer-.