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terraforming

/ (ˈtɛrəˌfɔːmɪŋ) /
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noun
planetary engineering designed to enhance the capacity of an extraterrestrial planetary environment to sustain life
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Which of the following nouns has an irregular plural form?

Word Origin for terraforming

C20: from Latin terra earth + forming
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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