sundial

[ suhn-dahy-uh l, -dahyl ]
/ ˈsʌnˌdaɪ əl, -ˌdaɪl /

noun

an instrument that indicates the time of day by means of the position, on a graduated plate or surface, of the shadow of the gnomon as it is cast by the sun.

Origin of sundial

First recorded in 1570–80; sun + dial
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

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British Dictionary definitions for sundial

sundial

/ (ˈsʌnˌdaɪəl) /

noun

a device indicating the time during the hours of sunlight by means of a stationary arm (the gnomon) that casts a shadow onto a plate or surface marked in hours
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012