[ 'nəʊmɒn ]
■ noun
1》 the projecting piece on a sundial that shows the time by its shadow.
2》 Geometry the part of a parallelogram left when a similar parallelogram has been taken from its corner.
3》 Astronomy a structure used in observing the sun's meridian altitude.
Derivatives
~ic -'mɒnɪk adjective
Origin
C16: via L. from Gk gnōmōn 'indicator, carpenter's square'.