DICT.TW Dictionary Taiwan

 yard·arm /ˈjɑrdˌɑrm/
 桁端

 Yard·arm n.
 1. Naut. Either half of a square-rigged vessel's yard6, from the center or mast to the end.
 Note: ☞ Ships are said to be yardarm and yardarm when so near as to touch, or interlock yards.
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 yardarm
      n : either end of the yard of a square-rigged ship