1. Any of numerous usually rhizomatous hybrid begonias derived from an East Indian plant having rough-textured leaves patterned in silver and bronze and purple and red-brown with inconspicuous flowers
   "The rex begonia displayed stunning metallic patterns on its leaves";
   - king begonia, painted-leaf begonia, beefsteak geranium, Begonia rex

1. A male sovereign; ruler of a kingdom
   - king, male monarch

Derived forms: Rexes

Type of: adult male, begonia, bozo [N. Amer, informal], cat [N. Amer, informal], chappie [Brit, informal], crowned head, geezer [Brit, informal], guy [informal], hombre [N. Amer, informal], man, monarch, sod [informal], sovereign

Antonym: queen

Part of: royal family, royal house, royal line, royalty

Encyclopedia: Rex begonia