parasitic

from The American Heritage® Dictionary of the English Language, 5th Edition.

• adjective Of, relating to, or characteristic of a parasite.
• adjective Caused by a parasite.

from The Century Dictionary.

• In ornithology, applied to birds which place their eggs in the nests of other birds.
• Having the characters of the Parasitica.
• Of the nature of a parasite; fawning for bread or favors; meanly dependent; acting the sycophant; like a parasite in any way; of things, secondary; subordinated to or arising from another thing of the same kind.
• Specifically In zoology and botany, living or growing as a parasite; pertaining to or characteristic of parasites. See cut under Orobanche.
• In philology, attached to a word erroneously or by false analogy: thus, d in vulgar drownd, t in margent, etc., are parasitic.

from the GNU version of the Collaborative International Dictionary of English.

• adjective Of the nature of a parasite; having the habits of a parasite; fawning for food or favors; sycophantic.
• adjective (Bot. & Zoöl.) Of or pertaining to parasites; living on, or deriving nourishment from, some other living animal or plant. See Parasite, 2 & 3.
• adjective (Zoöl.) See Jager.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective Pertaining to a biological or symbolic parasite.
• adjective Drawing upon another organism for sustenance.
• adjective Exploiting another for personal gain.
• noun computing Component of a circuit that does not show up in a circuit's schematic but does show up in the circuit's behavior.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• adjective of or pertaining to epenthesis
• adjective of plants or persons; having the nature or habits of a parasite or leech; living off another
• adjective relating to or caused by parasites