mūcus

4 English words descend from Latin mūcus, most common first.

mucusA slippery secretion from the lining of the mucous membranes.
mucousPertaining to mucus.
mucidMusty; mouldy; slimy or mucous.
mucivoreAn insect that feeds on mucus, or the sap of plants, such as certain Diptera like aphids.

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