Ooh, pun damage! Well done, sir.
"Four wire" would be Kvar drato, but you still get the pun points. (enough pun points get you a lingot) Kvadrat~ has the root meaning "square." At least according to my dictionaries.
It also has the mathematical meanings which "square" has in English. 4^2 = 16 Four squared equals sixteen: kvadrata kvar estas dekses.
When I read it I got "Quadralateral" so I read it as "A four sided shape" which made me think "Wait... But how do you say rectangle then? Or should this be something like egalan flankon kvadraton?
I haven't gotten there yet but if Triangle is Tridrato and Hexagon is Sesdrato I'm going to be very pleased with this way of naming things.