1. (n.) The style or pin, which by its shadow, shows the hour of the day. It is usually set parallel to the earth's axis.

2. (n.) A style or column erected perpendicularly to the horizon, formerly used in astronomical observations. Its principal use was to find the altitude of the sun by measuring the length of its shadow.

3. (n.) 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 of. The parallelogram bf is the complement of the parallelogram df.

4. (n.) The index of the hour circle of a globe.

Aristotelian sorites Establishment Goclenian sorites Platonic body Platonic form Platonic idea VIP accept acclaim acknowledge act acute-angled triangle add adornment adumbrate advert to aesthetic form algebraize allude to amount anacrusis anatomy angle apparition appear appearance appraise appreciate archetype aroma arrange art form asiaticism aspect assess assume attribute background background detail badge baron bass passage be conspicuous be demonstrable be featured be irrefutable be logical be reasonable be somebody be something be taken as bead beauties bejewel believe beribbon bespangle big gun big man big name bigwig binary digit bit blazon block out blueprint bod body body forth body-build bones bourdon brand brass brass hat bravura bridge brilliancy brouillon build burden bust cachet cadence calculate call carcass cartoon carve carving cast catch on to categorical syllogism celebrity character characteristic charge chart chassis chisel chorus cipher class clay clod coda colors colors of rhetoric compute concede concert conclude configuration conformation consider constellation contour contrive copy corpus cost count count on create cube cuboid cusp cut cut a dash cut a figure cut out cynosure damage daring dash decagon decipher decoration decorative composition decorative style delineation demonstrate demonstration denominate denote design designate detail determine development device devise diagram diamond differentia differential dig digit dignitary dignity dilemma display distinctive feature divide division dodecagon dodecahedron doll dolly dope out draft dramatics drawing dummy earmark ebauche eclat effect effigy efform eidolon elder elegant variation elevation embellishment emblem emblematize embody embroidery engrave enthymeme enumerate equilateral triangle esquisse estimate etalage euphuism evaluate exemplify exhibition exhibitionism expenditure expense exposition extract roots facet false front false image fame famousness fanfaronade fantasy fantoccini fashion father fathom feather feature features figuration figurative language figurativeness figure in figure of speech figure on figure out figure up figure-ground figurehead figurine filigree fine writing finger fix flag flair flaunt flaunting flavor flesh floridity floridness flounce flourish flower floweriness flowers of speech flowery style foil folderol folk hero foot force forecast