coltan, columbite-tantalite
(noun) a valuable black mineral combining niobite and tantalite; used in cell phones and computer chips
Source: WordNet® 3.1
coltan (plural coltans)
A metallic ore from which the elements niobium and tantalum are extracted.
Synonym: columbite-tantalite
• Calton, locant
Source: Wiktionary
28 March 2025
(noun) a person who invites guests to a social event (such as a party in his or her own home) and who is responsible for them while they are there
According to Guinness World Records, on 25 September 2016, the Birla Institute of Management Technology (India) in Uttar Pradesh, India, constructed the largest coffee cups pyramid consisting of 23,821 cups. They used paper takeaway coffee cups to build the pyramid.
