adjective
viscid
VIS-id/ˈvɪsɪd/
Thick, sticky, and slow-flowing.
The viscid syrup clings to the spoon and pours slowly.

Etymology
Viscum named mistletoe and the sticky birdlime made from it. That adhesive substance supplies the concrete image behind viscid: a liquid that is sticky and slow to flow.
More examples
- As the sauce cools, it becomes increasingly viscid.
- Viscid sap slowly oozes from the cut branch.
- The pump struggles to move the viscid liquid through the pipe.
Forms
viscid