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Biennial means (an event) lasting for two years or occurring every two years. The related term biennium is used in reference to a period of two years. In particular, it can refer to: Biennial plant, a plant which blooms in its second year and then dies
True biennials flower only once, while many perennials will flower every year once mature. The Sweet William Dwarf plant is a biennial plant. Biennials grown for flowers, fruits, or seeds are grown for two years, whereas those grown for edible leaves or roots are harvested after one year—and are not kept a second year to run to seed.
12 1 ⁄ 2 years: Parsley: A humorous or mock wedding anniversary celebrated in Northern Germany and the Netherlands, chosen because it is halfway to the silver anniversary. [2] [3] 13 years: Tredecennial: Lace: 14 years: Quattuordecennial: Ivory: 15 years: Quindecennial: Crystal: 16 years: Sexdecennial: Sapphire: Sapphire is separately used ...
The theoretical return period between occurrences is the inverse of the average frequency of occurrence. For example, a 10-year flood has a 1/10 = 0.1 or 10% chance of being exceeded in any one year and a 50-year flood has a 0.02 or 2% chance of being exceeded in any one year.
Likewise, 9 years and 5 + 1 ⁄ 2 days after a total solar eclipse or an annular solar eclipse occurs, a total lunar eclipse will also occur. This 9-year period is referred to as a sar. It includes 111 + 1 ⁄ 2 synodic months, or 111 synodic months plus one fortnight. The fortnight accounts for the alternation between solar and lunar eclipse.
The Venice International Film Festival is part of the Venice Biennale.The famous Golden Lion is awarded to the best film screening at the competition.. In the art world, a biennale (/ ˌ b iː ɛ ˈ n ɑː l eɪ,-l i / BEE-en-AH-lay, -lee, Italian: [bi.enˈnaːle]; Italian for 'biennial' / 'every other year'), is a large-scale international contemporary art exhibition.
Now Hear This is a monthly A&R column that provides you with exciting new sounds we discovered through the innovative new music platform Groover. Each month, you can expect a varied bouillabaisse ...
At 10 years you found 30 new cases. These people did not have HIV at 5 years, but did at 10, so you assume they were infected at 7.5 years, thus contributing (30 * 7.5) = 225 person-years of disease-free life. That is a total of (225 + 50) = 275 person years so far. You also want to account for the 150 people who never had or developed HIV over ...