: a gall that resembles a nut
especially
: such a gall produced on oaks
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“Nutgall.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/nutgall. Accessed 30 Jun. 2025.
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nutgall
noun
nut·gall
ˈnət-ˌgȯl 
: a gall that resembles a nut
especially
: a gall produced on an oak (especially Quercus infectoria) and used as a source of tannic acid
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