A tesseract is a mathematical term that refers to a four-dimensional object. It is like a cube, but with an additional dimension. It is often used to help visualize concepts in higher dimensions. Full definition
The three guardian beings transport Meg, her brother Charles Wallace, and her friend, around the stars by way of tesseracts, a nifty way of space travel. (refinery29.com)
Jessica Lang joined Steven Holl in the project Tesseracts of Time A Dance for Architecture, commissioned by Harris Theatre and Chicago Architecture Biennial (inexhibit.com)
Finally, if an advanced civilization can create a time - space bookshelf tesseract, why can't they equip it with a whiteboard? (businessinsider.com)