imitative

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

• adjective Of or involving imitation.
• adjective Not original; derivative.
• adjective Tending to imitate.
• adjective Onomatopoeic.

from The Century Dictionary.

• Imitating or inclined to imitate or copy.
• Aiming at imitation; exhibiting or designed to exhibit an imitation of a pattern or model.
• Formed after or presenting a similitude of a model, pattern, or original.

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

• adjective Inclined to imitate, copy, or follow; imitating; exhibiting some of the qualities or characteristics of a pattern or model; dependent on example; not original
• adjective Formed after a model, pattern, or original.
• adjective (Nat. Hist.) Designed to imitate another species of animal, or a plant, or inanimate object, for some useful purpose, such as protection from enemies; having resemblance to something else
• noun (Gram.), rare A verb expressive of imitation or resemblance.

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

• adjective Imitating; copying; not original.
• adjective Modelled after another thing.

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

• adjective marked by or given to imitation
• adjective (of words) formed in imitation of a natural sound
• adjective not genuine; imitating something superior