Wordnet 3.0
ADJECTIVE (1)
1. 
 of plants or persons; 
 having the nature or habits of a parasite or leech; 
 living off another; 
- Example: "a wealthy class parasitic upon the labor of the masses"- Example: "parasitic vines that strangle the trees"- Example: "bloodsucking blackmailer"- Example: "his indolent leechlike existence"[syn: parasitic, parasitical, leechlike, bloodsucking]
WordNet (r) 3.0 (2006):
leechlike
    adj 1: of plants or persons; having the nature or habits of a
           parasite or leech; living off another; "a wealthy class
           parasitic upon the labor of the masses"; "parasitic vines
           that strangle the trees"; "bloodsucking blackmailer";
           "his indolent leechlike existence" [syn: parasitic,
           parasitical, leechlike, bloodsucking]