1.
acorn
The nut of an oak tree. A familiar sight in autumn in Japan, often collected by children.
Common expressions
団栗の背比べ literally means "height comparison among acorns" — used to describe people or things that are all much the same with no clear winner. Similar to English "much of a muchness."
Usage
Usually written in hiragana as どんぐり. The kanji 団栗 is rarely used in everyday writing.
Common collocations
Related Words
Compare:
松ぼっくり (pine cone)