MU'COUS, adjective [See Mucus.] Pertaining to mucus or resembling it; slimy, ropy and lubricous; as a mucous substance. 1. Secreting a slimy substance; as the mucous membrane. The mucous membrane lines all the cavities of the body which open externally, and secretes the fluid called mucus.
Source: Webster's 1828 American Dictionary ↗ · public-domain · returned verbatim, no AI