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Webster 1913 Edition
Substyle
Sub′styleˊ
,Noun.
(Dialing)
A right line on which the style, or gnomon, of a dial is erected; being the common section of the face of the dial and a plane perpendicular to it passing through the style.
[Written also
substile
.] Hutton.
Webster 1828 Edition
Substyle
SUB'STYLE
,Noun.