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The word convex means curving out or bulging outward.

Convex

The word convex means curving out or bulging outward.

"A crown which appears on the great seal of Henry VIII." — Encyclopedia Britannica, 1893

Crown

"A crown which appears on the great seal of Henry VIII." — Encyclopedia Britannica, 1893

"The crown of the Stuart sovereigns, the first kings of Great Britain, James I and Charles I, had four arches, each of the eight semi-arches springing from the alternating crosses and fleurs-de-lys of the circlet." — Encyclopedia Britannica, 1893

Crown

"The crown of the Stuart sovereigns, the first kings of Great Britain, James I and Charles I, had four…

A line arched or enarched for dividing a field. "Escutcheons that have more than one tincture are divided by lines ... Curved and angular lines are numerous, and each has an Heraldic name expressive of its form." -Hall, 1862

Line Arched

A line arched or enarched for dividing a field. "Escutcheons that have more than one tincture are divided…