| NOUN | substance | bastnaesite, bastnasite | a yellow-to-brown mineral that is a source of rare earth elements |
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| Meaning | A yellow-to-brown mineral that is a source of rare earth elements. | |
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| Synonym | bastnasite | |
| Broader | mineral | Solid homogeneous inorganic substances occurring in nature having a definite chemical composition |
| Substances | cerium, Ce, atomic number 58 | A ductile grey metallic element of the lanthanide series |
| neodymium, Nd, atomic number 60 | A yellow trivalent metallic element of the rare earth group | |
| praseodymium, Pr, atomic number 59 | A soft yellowish-white trivalent metallic element of the rare earth group | |
| samarium, Sm, atomic number 62 | A grey lustrous metallic element of the rare earth group | |
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