Wordnet 3.0
ADVERB (1)
1. 
 by a factor of one hundred; 
- Example: "they money increased a hundredfold"[syn: hundredfold, a hundred times]
The Collaborative International Dictionary of English v.0.48:
Hundredfold \Hun"dred*fold`\, n.
   A hundred times as much or as many.
   [1913 Webster]
         He shall receive as hundredfold now in this time.
                                                  --Mark x. 30.
   [1913 Webster]
WordNet (r) 3.0 (2006):
hundredfold
    adv 1: by a factor of one hundred; "they money increased a
           hundredfold" [syn: hundredfold, a hundred times]