The plinth, or lowest member, of any pedestal, podium, water table, or the like.(noun)
A fillet, or listel.(noun)
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Use "quadra" in a sentence
"The last thing you want is the unflattering butt bulge or double butt cheeks (much like the quadra-boob you'll get with ill-fitting bras) that comes from granny panties."
"Posted in David Emerson, vancouver kingsway, vancouver quadra."
"But a Giraffe also has a 7-Bone neck section , does this ties us to a quadra-ped ?"