Mucilaginous \Mu`ci*lag"i*nous\, a. [Cf. F. mucilagineux. See {Mucilage}.] 1. Partaking of the nature of, or resembling, mucilage; moist, soft, and viscid; slimy; ropy; as, a mucilaginous liquid. 2. Of, pertaining to, or secreting, mucilage; as, the mucilaginous glands. 3. Soluble in water, but not in alcohol; yielding mucilage; as, mucilaginous gums or plants. -- {Mu`ci*lag"i*nous*ness}, n.