A spar; a long, round iron tube or piece of timber raised upright on the keel, through the decks, of a vessel to support the sails.

帆柱；桅；樯。

Any upright pole, as the main post of a derrick.

竿；柱。

Nuts, as of the oak, beech, chestnut, etc., esp. when used as fodder for swine.

坚果(如橡树、榉、栗等果实，用以饲猪者)。