n.

1. 【解】脾脏[C]
2. 坏脾气；怒气；恶意[U]
   He vented his spleen on her.

   他拿她出气。

3. 【古】忧郁；意志消沉[U]
4. 【旧】一时的冲动；怪想[U]

n.

1. Anatomy  an abdominal organ involved in the production and removal of blood cells and forming part of the immune system.
2. bad temper; spite.