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Autumn (Fall)   [ Ecology  - Climatology ]
Adjective: Autumnal
Adverb: Autumnally

Dictionary of botanic terminology - index of names

     
  Autumn  is one of the four seasons of temperate zones. The season of the year during which the weather becomes colder and plants enter a period of dormancy: The season when the leaves fall from the deciduous  trees.  
     
Autumn - often called fall in North America - is the season of the year between summer and winter when plants stop to vegetate and growth and prepare for the winter rest. Most crops are harvested in this period of the year and the leaves of deciduous trees and shrubs turn into yellow, red and brown colours before to fall.  It begins with the autumnal equinox (around September 23 in the Northern Hemisphere, and March 21 in the Southern Hemisphere), and ends with the winter solstice (around 21 December in the Northern hemisphere and 21 June in the Southern hemisphere)
It runs from September to November in the
Northern Hemisphere, and from March to May in the Southern Hemisphere.
At the end of this season hoar-frost  deposits during  coldest nights over plants and object, and the first
snow (if any) begins to fall. This is the time when plants are prepared and sheltered for overwintering.
     
Autumn (Adjective)     [ Ecology  - Climatology ]
Synonym: Autumnal
     
  1) Having to do with, occurring in, or appropriate to the season of Atumn.
For example: Autumnal fruits
2) Grown during the season of summer. Aestival
For example: autumnal flowers; autumnal crops.
 
     
The corresponding adjectives for springsummer and winter,   are vernalaestival and hibernal .
     

 

 

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