reg·u·la
| \ ˈregyələ \
plural regulae\
-ˌlē
\
Definition of regula
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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Merriam-Webster unabridged
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