ball mustard

noun

Definition of ball mustard

: a yellow-flowered European plant (Neslia paniculata) of the family Cruciferae having globose seed pods and being adventive in eastern North America

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“Ball mustard.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/ball%20mustard. Accessed 11 Aug. 2020.

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