General English


  • noun a powdery substance on the surface of a fruit such as grapes. Bloom is in fact a form of yeast.
  • noun a fine hairy covering on some fruit such as peaches


  • A thin, hazy film on old paint, usually caused by weathering.
  • A similar film on glass, resulting from general atmospheric deposition of impurities, or caused more by smoke, vapor, etc.
  • efflorescence on brickwork.
  • A hazy or other kind of discoloration that sometimes occurs on the surface of rubber products.
  • The term given to steel that has been reduced from an ingot by being rolled in a blooming mill to a dimension of at least 6" square; if further reduced, it becomes a billet.


  • The white coating on some fruits such as plums, grapes and peaches which is said to consist of wild yeasts
  • A white coating which appears on the surface of chocolate after variations in temperature over some time. Probably recrystallized fat and sugar.


  • noun fine hair on the skin of some fruit such as peaches


  • the period of time when a vine is in flower
  • a measure of how rigid a sheet of gelatin is when used in fining to clarify wine
  • a grey powdery coating that can cover grapes and is caused by dust and wax

Origin & History of “bloom”

The Old English word for ‘flower’ was the probably related blossom, and English did not acquire bloom until the 13th century, when it borrowed it from Old Norse blómi. this came from Germanic *blōmon, a derivative of the Indo-European *bhlō- which also produced Latin flōs (whence English flower), the now archaic English verb blow ‘come into flower’, and English blade.