1949, in the meaning defined above
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Cite this Entry
“Convertiplane.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/convertiplane. Accessed 30 Jun. 2022.
More from Merriam-Webster on convertiplane
Thesaurus: All synonyms and antonyms for convertiplane
Britannica.com: Encyclopedia article about convertiplane
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