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regula
noun
reg·u·la
\ˈregyələ\
Definition of regula
regulae
\-ˌlē\1 : an architectural band or fillet especially when one of a series beneath the taenia in a Doric architrave of which each corresponds to a triglyph above and has a row of six guttae on its lower side
2 : rule the authoritative regula for community life
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Origin and Etymology of regula
Latin regula straightedge, rule
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