Archit.
an arch having a more or less flat intrados and extrados with voussoirs radiating from a center below the arch. See illus. under arch . Also called jack arch .
[ 1705-15 ]
Archit.
an arch having a more or less flat intrados and extrados with voussoirs radiating from a center below the arch. See illus. under arch . Also called jack arch .
[ 1705-15 ]
Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012