eighth

Từ điển Oxford Advanced Learner 8th

eighth [eighth eighths] ordinal number, noun BrE [eɪtθ] NAmE [eɪtθ]
ordinal number
8th  There are examples of how to use ordinal numbers at the entry for fifth.
 
noun
each of eight equal parts of sth
 

• Từ đồng nghĩa / Synonyms:
  8th, one-eighth