also: おうろ
noun
coins (suit in Portuguese-suited playing cards)
Refers to the suit of coins in traditional Portuguese-suited playing cards, used in Japan for games like うんすんカルタ. Not used for modern Western playing cards.
from Portuguese ouros
うんすんカルタでは、オウルは金貨を表すスートです。
In Unsun Karuta, オウル is the suit representing gold coins.