An object such as a pillar or a rod that is used to tell time by the shadow it casts when the sun shines on it, especially the pointer on a sundial.

plural of gnomon

The science, art and craft of designing and constructing sundials.

(cartography) Showing all great circles as straight lines, and thus preserving the shortest distances between any two locations.

According to the principles of the gnomonic projection.

Alternative form of gnomonic

(cartography) A mapping projection in which all great circle paths (on a sphere the shortest path between points) are shown as straight lines.

plural of gnomonic projection

One skilled in gnomonics; a person who makes sundials.

plural of gnomonist