biennial

Từ điển Oxford Advanced Learner 8th

bi·en·nial [biennial biennials] adjective, noun BrE [baɪˈeniəl] NAmE [baɪˈeniəl]
adjective usually before noun
happening once every two years
•a biennial convention
see also ↑annual, ↑biannual

Word Origin:
early 17th cent.: from Latin biennis (from bi- ‘twice’ + annus ‘year’) + ↑-al.
Derived Word: ↑biennially
 
noun
any plant that lives for two years, producing flowers in the second year
compare ↑annual, ↑perennial

Word Origin:
early 17th cent.: from Latin biennis (from bi- ‘twice’ + annus ‘year’) + ↑-al.
 

• Từ đồng nghĩa / Synonyms:
  biyearly, two-year
• Từ trái nghĩa / Antonyms:
  perennial, annual, one-year