1. a yellow metallic mineral consisting of nickel sulfide
Usage: mineralogy
2. a follower of William Miller who believed in his prediction of Christ’s second coming in the 1840s
Usage: historical; religious

Examples

• The geologist identified the yellow crystal as millerite.
• Millerite is an important ore of nickel.
• The mineral specimen contained thin needles of millerite.
• Many Millerites gathered on hilltops waiting for the predicted event.
• The Millerite movement experienced great disappointment in 1844.
• Some Millerites later formed the Seventh-day Adventist Church.