1. (noun)
rex begonia, king begonia, painted-leaf begonia, beefsteak geranium, Begonia rex
- 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 Synonyms: king begonia, rex begonia, painted-leaf begonia, beefsteak geranium