(noun)
crested thick-billed North American finch having bright red plumage in the male
(noun)
the number of elements in a mathematical set; denotes a quantity but not the order
(noun)
a variable color averaging a vivid red
(adjective)
serving as an essential component
a cardinal rule
(adjective)
being or denoting a numerical quantity but not order
cardinal numbers
(noun)
(Roman Catholic Church) one of a group of more than 100 prominent bishops in the Sacred College who advise the Pope and elect new Popes