The Collaborative International Dictionary
Four-cornered \Four"-cor`nered\, a. Having four corners or angles.
Usage examples of "four-cornered".
Swiss and German soldiers, with short tight coats of various colours: they were armed with short swords, with steel edges like those of the ancient Romans, and carried ashen lances ten feet long, with straight and sharp iron spikes: only one-fourth of their number bore halberts instead of lances, the spikes cut into the form of an axe and surmounted by a four-cornered spike, to be used both for cutting like an axe and piercing like a bayonet: the first row of each battalion wore helmets and cuirasses which protected the head and chest, and when the men were drawn up for battle they presented to the enemy a triple array of iron spikes, which they could raise or lower like the spines of a porcupine.
I was about to give it up and fold my tent when I looked again at the most obvious thing on that desk-the blotting pad with its four-cornered leather holder.