Biennial
Biennial
Biennial (/baɪˈɛniəl/; from Latin biennium, meaning "two years") is a term used in various fields, including botany, zoology, and event planning, to describe something that occurs every two years or lasts for two years.
Etymology
The term biennial is derived from the Latin biennium, which is a combination of bi- ("two") and -ennium ("year"). It was first used in English in the 17th century.
In Botany
In botany, a biennial plant is a type of plant that completes its entire life cycle in two years. In the first year, these plants grow leaves, stems, and roots (vegetative structures), then enter a period of dormancy over the colder months. Usually during the second year, the plant will flower and produce fruits and seeds before dying. Examples of biennial plants include carrot, parsley, and sweet William.
In Zoology
In zoology, biennial reproduction is a reproductive cycle that takes place every two years. This is less common than annual or perennial reproduction cycles, but can be found in certain species of animals, such as the Alpine marmot.
In Event Planning
In the field of event planning, a biennial event is an event that takes place every two years. This term is often used to describe exhibitions, festivals, and conferences. Notable examples include the Venice Biennale and the Whitney Biennial.
Related Terms
- Annual: Occurring once every year.
- Perennial: Lasting or existing for a long or apparently infinite time; enduring or continually recurring.
- Triennial: Occurring every three years.
External links
- Medical encyclopedia article on Biennial
- Wikipedia's article - Biennial
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