Wordnet 3.0
ADJECTIVE (1)
1. 
 capable of being resisted or withstood or frustrated; 
- Example: "a resistible attack"- Example: "such resistible temptations"
The Collaborative International Dictionary of English v.0.48:
Resistible \Re*sist"i*ble\ (r?-z?st"?-b'l), a. [Cf. F.
   r['e]sistible.]
   Capable of being resisted; as, a resistible force. --Sir M.
   Hale. -- Re*sist"i*ble*ness, n. -- Re*sist"i*bly, adv.
   [1913 Webster]
WordNet (r) 3.0 (2006):
resistible
    adj 1: capable of being resisted or withstood or frustrated; "a
           resistible attack"; "such resistible temptations" [ant:
           irresistible, resistless]