A thick layer of mucus coated the inside of the aquarium filter, reducing water flow.

The cave's walls were covered in a slippery, mucuslike film that clung to our boots.

The lab technician carefully examined the mucuses collected from the nasal swabs.

After waking up, his pillowcase smelled mucussy, so he opened the window to air the room.

A mucusy film coated the pond at dawn, reflecting the pale sunrise.

The patient's urinalysis revealed mucusuria, so the doctor ordered additional tests.

After the treatment, the doctor confirmed the patient's airway was mucusless and breathing was easier.