tessaract

English

Etymology

From tessara- (“four-”) +‎ Ancient Greek ἀκτίς (aktís, “ray”). Coined by British mathematician Charles Howard Hinton in 1888.

Noun

tessaract (plural tessaracts)

1. Alternative spelling of tesseract.
   • 1917, Algernon Blackwood, “A Victim of Higher Space”, in Day and Night Stories:

     The tessaract, the figure whose boundaries are cubes, I knew by heart.