bur oak

a North American white oak (Quercus macrocarpa) having large acorns with fringed cups; mossy-cup oak
bur oak

noun
A deciduous oak tree (Quercus macrocarpa) of eastern North America, having deeply lobed leaves, acorns enclosed within a deep fringed cup, and hard durable wood.
bur-oak

Noun
(plural bur oaks)
- Quercus macrocarpa.