viscous

Viscous, a.

Etymology: [L. viscosus. See Viscid.]

Adhesive or sticky, and having a ropy or glutinous consistency; viscid; glutinous; clammy; tenacious; as, a viscous juice. -- Vis"cous*ness, n.

Note: There is no well-defined distinction in meaning between viscous and viscid.

Shades of meaning

Fernald has no entry of its own for viscous; he lists it under adhesive.

Where he writes about it:

Glutinous, gummy, viscid, and viscous are applied to fluid or semi-fluid substances, as pitch or tar. — from adhesive