| 单词 | canada balsam |
| 释义 | > as lemmasCanada balsam Canada balsam n. a resin which exudes from either of two coniferous trees native to eastern and central North America, the balsam fir ( Abies balsamea) and eastern hemlock ( Tsuga canadensis); a pale yellow turpentine made from such resin, commonly used as a varnish, glue, and mounting medium for microscope slides; = Canada turpentine n. at sense 7.Dried Canada balsam has a refractive index close to that of glass, and has been used to produce plane-polarized light. Cf. Nicol prism at Nicol n.2extracted from Canadan.1< as lemmas |
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