Gound vs. Rheum — What's the Difference?

Mucus produced by the eyes during sleep.

Rheum (; from Greek: ῥεῦμα rheuma 'a flowing, rheum') is a thin mucus naturally discharged from the eyes, nose, or mouth, often during sleep (cf. mucopurulent discharge).

Gummy matter in sore eyes.

A watery or thin mucous discharge from the eyes or nose.

(uncountable) Watery or thin discharge of serum or mucus, especially from the eyes or nose, formerly thought to cause disease.

Illness or disease thought to be caused by such secretions; a catarrh, a cold; rheumatism.

(poetic) Tears.

A genus of plants. See Rhubarb.

A serous or mucous discharge, especially one from the eves or nose.

A watery discharge from the mucous membranes (especially from the eyes or nose)

Rhubarb