n.

1. 【解】脾臟[C]
2. 壞脾氣；怒氣；惡意[U]
   He vented his spleen on her.

   他拿她出氣。

3. 【古】憂鬱；意志消沉[U]
4. 【舊】一時的衝動；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.