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blue stain

noun, Plant Pathology.
a serious fungal disease of certain trees that reduces the economic value of the timber, caused by various species of the genus Ceratocystis. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2018.
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Examples from the Web for blue stain
Historical Examples
  • 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
  • The face and body were painted with red and white ochre and a blue stain.

    Dress design

    Talbot Hughes
  • From the plant indigoferae was obtained a blue stain, known as indigo.

    Practical Basketry Anna A. Gill
  • 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
  • When any acid is applied to the writing on this paper the blue stain of Prussian blue appears.

British Dictionary definitions for blue stain

blue stain

(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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