Apparently, Regenerates aren't the only ones who have service on our minds. It turns out our friends at Dictionary.com do too.
Today's word of the day:
eleemosynary \el-uh-MOS-uh-ner-ee\, adjective:
1. Of or for charity; charitable; as, "an eleemosynary institution."
2. Given in charity; having the nature of alms; as, "eleemosynary assistance."
3. Supported by or dependent on charity; as, "the eleemosynary poor."
Click on the link for three ways to use the word. I'm sure your friends will be impressed you've found another word to describe altruism.