What is another word for lanthanide?
Pronunciation: [lˈanθɐnˌa͡ɪd] (IPA) 
Lanthanides are a group of elements found in the periodic table, specifically located in the f-block. These elements are also known as rare-earth elements due to their limited abundance in the earth's crust. However, there are many other synonyms for the word "lanthanide," including rare-earth metals, rare-earth minerals, rare-earth oxides, and rare-earth elements. These synonyms are all related to the fact that these elements are relatively rare and difficult to extract from the earth's crust. While there are only 15 known lanthanides, they have a wide range of uses in various industries, including electronics, lighting, and medical equipment.
