American Heritage Dictionary
Century Dictionary
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GNU Webster's 1913
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WordNet
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Elsewhere on the web
The supposition that mammals had evolved from reptiles, Hubrecht averred, had for too long hinged on the modern day existence of egg-laying monotreme mammals like the duck-billed platypus.— ScienceBlogs Channel : Life Science
He rose to fame in 2000 with his discovery of Leonardo _ a mummified, 77-million-year-old duck-billed hadrosaur considered the world's best preserved dinosaur.
ACE Team's first-person punch-up Zeno Clash, in which you wrestle with a menagerie of duck-billed goodness-knowses in a beautiful fantasy setting, has been reduced in price by half until 8pm GMT today.— Eurogamer
The duck-billed platypus is a truly unique animal; a monotreme with almost no close relatives alive on earth.— Naturejobs - All Jobs
It is often said that a camel is a horse designed by committee but I suspect the SFA committee system would have produced a duck-billed platypus given the same original specifications.

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