In Madeleine L’Engle’s classic novel, A Wrinkle in Time, the term ‘tesser’ refers to the concept of ‘tessering,’ which is a form of travel through space and time. Essentially, to tesser means to move across dimensions in a way that allows characters to bypass the traditional constraints of distance.
The concept of tessering is illustrated through the journey of the main characters as they traverse the universe to rescue Meg’s father. It can be visualized as folding the fabric of space, creating shortcuts between two distant points. This enables the characters to travel vast distances in the blink of an eye. The idea is rooted in the exploration of higher dimensions and serves as a key plot device in the story.