alma mater        
noun [ S ] uk/ˌæl.məˈmɑː.tər/ /ˌæl.məˈmeɪ.tər/ us/ˌæl.mə ˈmɑː.t̬ɚ/ /ˌɑːl.mə ˈmɑː.t̬ɚ/
your alma mater formal母校 
the school, college, or university where you studied
  He wanted to go back to his hometown and teach at his alma mater.
 She decided to apply to her mother's alma mater, Ithaca College.
 My alma mater is forever asking me to donate to the annual fund. 
He had a golf shirt with the name of his alma mater stitched on the breast.
  US校歌 
the official song of a school, college, or university