Short for Gelatinous
Cube, a
monster in the Dungeons and Dragons universe in the category of unaligned Ooze, typically portrayed as a large
cube-shaped creature made entirely of a translucent or transparent gelatinous substance.
The adventurers encountered a gelatinous
cube blocking their
path, leaving behind a trail of dissolved stone and bone fragments, and they quickly realized that they needed to find a way to bypass the glube without getting engulfed.