What is a repeated line in a poem called?

Related questions

1. What is the oldest form of poetry?
2. What is the true meaning of poetry?
3. Why do we learn poetry?
4. Why do we study poetry?
5. What is a 8 line poem called?
6. Do you write poetry?
7. What is difference between poetry and poem?
8. What is a 13 line poem called?
9. Why is poetry so great?
10. Are there Poetry rules?

Tags

1. #after
2. #throughout
3. #group
4. #refrain
5. #phrase
6. #stanza
7. #occurrence
8. #every
9. #usually
10. #sounds
11. #repeated
12. #lines
13. #similar
14. #rhyme
15. #words