acorn /ˈeˌkɔrn, kɚ/
橡實,橡子
acorn
橡實管
A·corn n.
1. The fruit of the oak, being an oval nut growing in a woody cup or cupule.
2. Naut. A cone-shaped piece of wood on the point of the spindle above the vane, on the mast-head.
3. Zool. See Acorn-shell.
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acorn
n : fruit of the oak tree: a smooth thin-walled nut in a woody
cup-shaped base