An organism or cell that lives within or shares the space of a coenocyte or coenosarcal structure.
From Greek koinos (common) + site (dwelling), describing organisms that inhabit shared or common spaces, used in ecology and parasitology.
A coenosite might be a tiny worm living inside a coral's coenosarc or a fungus parasitizing a coenocytic network—they're freeloaders in someone else's shared home.
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