Amphibian Sign Video
Upload On Fri Jul 29 2011 by ASL STEM
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Definition
any of a class (Amphibia) of cold-blooded vertebrates (as frogs, toads, or salamanders) intermediate in many characters between fishes and reptiles and having gilled aquatic larvae and air-breathing adults
Source: http://www.merriam-webster.com/dictionary/amphibian
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