A thick, slippery substance produced by the body's glands to protect and moisten surfaces
Examples:
The doctor explained how mucus protects our lungs.Seasonal allergies often lead to excess mucus production.Mucus traps dust and microbes entering the nasal cavity.
Synonyms:
Antonyms:
Mucous
A slippery substance produced by membranes in the body, often found in the nose and throat.
Examples:
The snail leaves a mucous trail across the pavement.Mucous membranes line various cavities within the body.During allergies, mucous production can significantly increase.
Synonyms:
Antonyms:
Ways to tell them apart:
Mucus has a u, just like substance, and it refers to the slimy substance itself.
Mucous has an o, like condition, and it describes something related to or producing mucus.
Remember, mucous as an adjective usually describes membranes, whereas mucus is the noun for the slime.
If you can replace the word with slime, use mucus.
If you can replace the word with slimy, use mucous.