a male sovereign; ruler of a kingdom
"The new king was crowned rex after his father's death."
An animal which has a genetic recessive variation that causes the guard hairs to be very short or fully lacking.
"The rex cat's coat is so soft and curly because it carries a gene mutation causing its guard hairs to be extremely short or completely absent."
In plain English: Rex is just Latin for king, often used as part of names to mean royal or majestic.
"King Rex ruled over his kingdom with kindness and wisdom."
Usage: Rex refers specifically to an animal with a gene mutation causing extremely short or absent guard hairs, distinguishing it from other coat types based on texture rather than color or pattern. Use this term when describing breeds like the Persian cat or Angora rabbit that exhibit this unique genetic trait for hair length and density.
The reigning king.
"The rex signed the treaty before stepping down from his throne."
The word rex comes from Latin for "king," but it entered English in about 1920 as a fancy name for Belgian rabbits with fur resembling that of beavers. Although its root means king, the term was applied to these animals rather than referring to human royalty or other creatures.