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guaiac

[gwahy-ak] /ˈgwaɪ æk/
noun
1.
Also called guaiacum gum, gum guaiac. a greenish-brown resin obtained from the guaiacum tree, especially from Guaiacum officinale, used in varnishes, as a food preservative, and in medicine in various tests for the presence of blood.
2.
guaiacum (def 2).
Origin of guaiac
1550-1560
First recorded in 1550-60; See origin at guaiacum
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Based on the Random House Dictionary, © Random House, Inc. 2017.
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