noun. indicator provided by the stationary arm whose shadow indicates the time on the sundial.
- gnomon (Latin)
- γνώμων (Ancient Greek (to 1453))
Example sentences of the word gnomon
1. Noun, singular or mass
Set your watch to the local time and at the top of a morning hour, move the hour band so that the edge of the gnomon's shadow falls across the matching number on the band.