Gnomon

The gnomon is the triangular blade in this sundial.

A gnomon (/ˈnˌmɒn, -mən/; from Ancient Greek γνώμων (gnṓmōn) 'one that knows or examines')[1][2] is the part of a sundial that casts a shadow. The term is used for a variety of purposes in mathematics and other fields.

  1. ^ γνώμων. Liddell, Henry George; Scott, Robert; A Greek–English Lexicon at the Perseus Project.
  2. ^ Harper, Douglas. "gnomon". Online Etymology Dictionary.