Wordnet 3.0
ADJECTIVE (1)
1. 
 self-restraining; 
 not indulging an appetite especially for food or drink; 
- Example: "not totally abstinent but abstemious"[syn: abstinent, abstentious]
The Collaborative International Dictionary of English v.0.48:
Abstentious \Ab*sten"tious\, a.
   Characterized by abstinence; self-restraining. --Farrar.
   [1913 Webster]
WordNet (r) 3.0 (2006):
abstentious
    adj 1: self-restraining; not indulging an appetite especially
           for food or drink; "not totally abstinent but abstemious"
           [syn: abstinent, abstentious]