Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
References in periodicals archive ?
For example, both HEPTANGULAR and SEPTANGULAR exist with the same meaning.
Septangular star is inscribed by the pagan symbols of the sun and spiral plant.
Unusual septangular sign rarely seen in Central Asia was discovered carved on old building in Uzbekistan, according to the portal MyTashkent.