Cerium/ˈsɪriəm/ Definition 1 of 1Pro Tip 1/3Technical Term Used primarily in scientific and industrial contexts, not common in everyday language. The engineer measured the cerium content in the alloy. Pro Tip 2/3Industry Usage Cerium is notable in manufacturing and tech sectors, less so in others. Cerium alloys are essential for aircraft engine parts. Pro Tip 3/3Mispronunciation It's pronounced 'seer-ee-um', with the emphasis on the first syllable. Could you pass me that sample of cerium?