Did the early Church use the term "altar" or "table"?

I'm really trying find out more about how the early Church understood Communion, or the Eucharist, or the Lord's Table. One of the crucial aspects (for me) is whether they saw the Eucharist as a sacrifice/oblation (as the Catholic or Eastern-Orthodox do). If the Eucharist truly was a sacrifice, then it follows that the sacrifice takes place on an altar. So the question is does the Bible or any of the early Church writings call the Lord's Table an "altar"? And if not, when/how did the practice emerge?