indicator provided by the stationary arm whose shadow indicates the time on the sundial
The space included between the boundary lines of two similar parallelograms, the one within the other, with an angle in common; as, the gnomon bcdefg of the parallelograms ac and af
A ``stick'' on a sundial that casts a shadow on the face of the sundial The postion and/or length of the shadow gives the time and date
Its principal use was to find the altitude of the sun by measuring the length of its shadow
{i} (Astronomy) device for finding the height of the Sun by measuring noontime shadows; vertical shaft of a sundial; (Geometry) what remains of a parallelogram after removing a similar parallelogram from one of its corners
gnomon
Hyphenation
gno·mon
Pronunciation
Etymology
[ 'nO-m&n, -"män ] (noun.) 1546. From Latin gnomon, from Ancient Greek γνώμων (gnōmōn, “indicator”), related to γιγνώσκω (gignōskō, “I know”) & γνώση (gnôsê, “knowledge”).