How would you describe a substance that has a gelatinous or gluey quality?

The word "viscous" accurately describes a substance characterized by a gelatinous or gluey quality. This term refers to liquids that are thick and sticky, with a resistance to flow, indicating a certain level of density. Viscous substances often have a texture that is similar to that of gelatin or glue, making it difficult for them to pour easily. This aligns with the concept of something being gelatinous, as such a texture is inherently thick and sticky, which is precisely what viscous substances are known for.

In contrast, while "fluid" suggests a substance that flows easily, it does not convey the thickness or stickiness that is indicative of a viscous quality. "Runny" implies a thin, easily flowing consistency, which again does not capture the essence of being gluey or gelatinous. Lastly, "thick" could describe a range of substances but lacks the specific connotation of stickiness and resistance to flowing that is central to the meaning of "viscous."