资料来源 : pyDict

袖孔

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Armhole \Arm"hole`\, n. [Arm + hole.]
   1. The cavity under the shoulder; the armpit. --Bacon.

   2. A hole for the arm in a garment.

资料来源 : WordNet®

armhole
     n : a hole through which you put your arm and where a sleeve can
         be attached