Canada balsam

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Can·a·da bal·sam

a yellowish liquid resin from the balsam fir, Abies balsamea (family Pinaceae); contains kinene and bornyl acetate; used for mounting histologic specimens and as a cement for lenses.
Synonym(s): Canada turpentine

Canada balsam

a commonly used microscope slide mounting material for biological specimens. It is miscible with xylene.

Canada balsam 

A transparent resinous substance produced by the sap of the Canadian balsam fir and used to cement glass (doublet, beam-splitting prisms, the segment of a bifocal lens, etc). Its index of refraction is equal to about 1.54. It has nowadays been superseded by modern chemical adhesives.
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