Hypertext Webster Gateway: "sundial"
From Webster's Revised Unabridged Dictionary (1913) (web1913)
Sundial \Sun"di`al\, n.
An instrument to show the time of day by means of the shadow
of a gnomon, or style, on a plate.
{Sundial shell} (Zo["o]l.), any shell of the genus Solarium.
See {Solarium}.
From WordNet (r) 1.7 (wn)
sundial
n : timepiece that indicates the daylight hours by the shadow
that the gnomon casts on a calibrated dial
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