the 12th letter of the Roman alphabet | crested thick-billed North American finch having bright red plumage in the male |
a metric unit of capacity, formerly defined as the volume of one kilogram of pure water under standard conditions; now equal to 1,000 cubic centimeters (or approximately 1.75 pints) | a variable color averaging a vivid red |
| (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 |
| the number of elements in a mathematical set; denotes a quantity but not the order |