1.  canada balsam(n = noun.substance) - yellow transparent exudate of the balsam fir; used as a transparent cement in optical devices (especially in microscopy) and as a mounting medium;
is a kind of oleoresin

2.  canada balsam(n = noun.plant) abies balsamea, balm of gilead, balsam fir - medium-sized fir of northeastern North America; leaves smell of balsam when crushed; much used for pulpwood and Christmas trees;
is a kind of silver fir

canada balsam, n. Biol. a yellow resin obtained from the balsam fir and used for mounting preparations on microscope slides (its refractive index being similar to that of glass).

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