tetractys
English
Etymology
Borrowed from Ancient Greek τετρακτύς (tetraktús).
Noun
tetractys
- A triangular figure consisting of ten points arranged in four rows, representing the fourth triangular number and having mystical significance to the Pythagoreans.
This article is issued from Wiktionary. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.