Definition that contains acorn
- oak a deciduous tree of the genus Quercus; has acorns and lobed leaves
- mast nuts of forest trees (as beechnuts and acorns) accumulated on the ground
- ctenophora comb jellies; sea acorns; a small phylum formerly considered a class of Coelenterata
- shumard red oak large deciduous red oak of southern and eastern United States having large seven-lobed to nine-lobed elliptical leaves, large acorns and medium hard coarse-grained wood
- overcup oak medium-large deciduous timber tree of central and southern United States; acorns deeply immersed in the cup and mature in first year
- bur oak medium to large deciduous oak of central and eastern North America with ovoid acorns deeply immersed in large fringed cups; yields tough close-grained wood
- white oak any of numerous Old World and American oaks having 6 to 8 stamens in each floret, acorns that mature in one year and leaf veins that never extend beyond the margin of the leaf
- quercus lyrata medium-large deciduous timber tree of central and southern United States; acorns deeply immersed in the cup and mature in first year
- quercus vaccinifolia a low spreading or prostrate shrub of southwestern United States with small acorns and leaves resembling those of the huckleberry
- mossycup oak medium to large deciduous oak of central and eastern North America with ovoid acorns deeply immersed in large fringed cups; yields tough close-grained wood