a spherical shell of colour surrounding and produced by a radioactive inclusion in certain minerals, manifesting in section as a ring or halo…
| 单词 | θ70754 | 
| 释义 | the world > matter > chemistry > crystallography (general) > crystal (general) > crystal inclusions > 			[noun]		 > radioactive inclusion (2)		 pleochroic halo1894 a spherical shell of colour surrounding and produced by a radioactive inclusion in certain minerals, manifesting in section as a ring or halo… radiohalo1920 = pleochroic halo n. at pleochroic, adj. compounds. | 
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