: any of several grasses (genus Agrostis) with usually reddish panicles
especially
: a Eurasian grass (A. alba synonym A. gigantea) grown in eastern North America as forage and lawn grass
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“Redtop.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/redtop. Accessed 1 Jul. 2025.
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