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blue stain

noun, Plant Pathology
1.
a serious fungal disease of certain trees that reduces the economic value of the timber, caused by various species of the genus Ceratocystis.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the Web for blue stain
Historical Examples
  • When any acid is applied to the writing on this paper the blue stain of Prussian blue appears.

  • Its presence was only to be detected by the blue stain it gave off during its growth.

    The Blue Germ Martin Swayne
  • Only occasionally did I catch the blue stain in the eyes of the throng about me.

    The Blue Germ Martin Swayne
  • From the plant indigoferae was obtained a blue stain, known as indigo.

    Practical Basketry Anna A. Gill
  • The face and body were painted with red and white ochre and a blue stain.

    Dress design Talbot Hughes
  • The young trapper had, in effect, hit the mark in the very centre, as the blue stain of the bullet testified.

    The Scalp Hunters Mayne Reid
British Dictionary definitions for blue stain

blue stain

noun
1.
(forestry) a bluish discoloration of sapwood caused by growth of fungi
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Value for blue

6
9
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