acorn

acorn
/ˈeɪkɔ:n; `eˌkɔrn/ n
1 fruit of the oak-tree, with a cup-like base 橡子, 栎实（栎树的果实）. =>illus at App 1 见附录1之插图, page i.
2 (idm 习语) big, etc oaks from little acorns grow => oak.

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