Final answer:
The Chorus refers to the lovers as 'Star-crossed lovers,' a term from Shakespeare's 'Romeo and Juliet' symbolizing doomed fate.
Step-by-step explanation:
The term used by the Chorus to describe the lovers is "Star-crossed lovers." This phrase originates from Shakespeare's play "Romeo and Juliet" where it refers to a pair of lovers whose relationship is doomed to fail due to external circumstances beyond their control. The use of this term reflects the idea of fate and destiny which plays a critical role in the tragedy of the story.