Four-Dimensional Version of a Cube
Puzzle 4 of Dungeon Delving Pack
Question is: Four-Dimensional Version of a Cube
and the answer is: TESSERACT
Word Meaning:
TESSERACT — (mathematics, geometry) The four-dimensional analogue of a cube; a 4D polytope bounded by eight cubes (analogously to the way a cube is bounded by six squares).
Definitions from Wiktionary.