B3I1E1N1N1I1A1L1
10 points
BIENNIAL is validvalid
an event that occurs every two years [n BIENNIALS]
occurring every two years [adj BIENNIALLY] / something e.g. a plant occurring every two years; lasting for two years [n -S]
an event that occurs every two years [n BIENNIALS]
occurring every two years [adj BIENNIALLY] / something e.g. a plant occurring every two years; lasting for two years [n -S]