pa·pil·i·o·na·ceous
| \ pə-ˌpi-lē-ə-ˈnā-shəs
\
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Definition of papilionaceous
: having a corolla (as in the bean or pea) with usually five petals that include a large upper petal enclosing two lateral wings and a lower carina of two united petals
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“Papilionaceous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/papilionaceous. Accessed 6 Jul. 2022.
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Time Traveler for papilionaceous
The first known use of papilionaceous was in 1668
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