gnomon


gno·mon

noun \ˈnō-mən, -ˌmän\

Definition of GNOMON

1
:  an object that by the position or length of its shadow serves as an indicator especially of the hour of the day: as
a :  the pin of a sundial
b :  a column or shaft erected perpendicular to the horizon
2
:  the remainder of a parallelogram after the removal of a similar parallelogram containing one of its corners

Illustration of GNOMON

Origin of GNOMON

Latin, from Greek gnōmōn interpreter, pointer on a sundial, from gignōskein
First Known Use: 1546

Rhymes with GNOMON

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