gno·​mon·​ic | \(ˈ)nō¦mänik\
variants: or less commonly gnomonical \-​änə̇kəl \

Definition of gnomonic 

1 : of or relating to the gnomon of a sundial or its use in telling time

2 : gnomic

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History and Etymology for gnomonic

gnomonic from Latin gnomonicus, from Greek gnōmonikos, from gnōmon-, gnōmōn pointer on a sundial + -ikos -ic; gnomonical from Latin gnomonicus + English -al

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