ノモン

noun

gnomon; stationary arm of a sundial

Technical term for the part of a sundial that casts a shadow. Also used in geometry for the shape that remains after removing a similar shape from a corner.

See also: ノモン投影 (ノモンとうえい)

• 日ひ時計どけいのノモンが影かげを落おとしている。

  The gnomon of the sundial is casting a shadow.

• ノモン投とう影えいという技ぎ法ほうがある。

  There is a technique called gnomon projection.