Endozoa

Part of speech: noun

Definitions

1. Animals that live within the bodies of other organisms, such as parasites found in the gut or tissues of a host
2. Creatures dwelling inside the tissues or body cavities of another animal, often as parasites or commensals
3. Organisms that inhabit the interior of a host animal, typically depending on it for shelter and nourishment

Etymology: "Endozoa" is the plural of "endozoon," a compound of two Greek elements: "endon," meaning "within," and "zoon," meaning "animal" or "living being." Together they name an animal that lives inside another organism, such as an internal parasite.