: the nut of the oak usually seated in or surrounded by a hard woody cupule of indurated bracts
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Examples of acorn in a Sentence
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The oak is one of the Tongva people’s sacred plants; its acorns are a staple in traditional meals.—Rebecca Plevin, Los Angeles Times, 19 Jan. 2025 This cabinet comes in three different finishes: acorn, black, and rubberwood.—Sophia Beams, Better Homes & Gardens, 17 Jan. 2025 In short, acorns are packed with nutrients and antioxidants, Balls says.—Hannah Yasharoff, USA TODAY, 12 Jan. 2025 The starch grains originate from various plant sources, such as acorns, grass grains, water chestnuts, yellow water lily rhizomes (a type of underground plant stem) and legume seeds.—Newsweek, 8 Jan. 2025 See all Example Sentences for acorn
Word History
Etymology
Middle English akorn, akkorn (partially assimilated to corn "kernel, corn entry 1"), hakerne, accherne, accharne, going back to Old English æcern, going back to Germanic *akrana- (whence also Middle High German ackeran "tree nuts," Old Norse akarn, Gothic akran "fruit, produce"); akin to Old Irish írne "sloe, kernel," Welsh eirin "plums, sloes," aeron "fruits, berries," going back to Celtic *agrinyo-, *agranyo-; perhaps further akin to a Balto-Slavic word with an initial long vowel (Old Church Slavic agoda "fruit," Polish jagoda "berry," Lithuanian úoga)
Note:
Taken to be a derivative of Indo-European *h2eǵros "uncultivated field, pasture" (see acre), though this would seem to exclude the Balto-Slavic etymon, which lacks the suffix, from consideration. It is also not clear if fields, uncultivated or not, are the source of wild tree nuts.
First Known Use
before the 12th century, in the meaning defined above
Time Traveler
The first known use of acorn was
before the 12th century
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