burrstone (countable and uncountable, plural burrstones)
A tough, silicified limestone formerly used to make millstones. It is typified by the presence of multiple cavities that originally housed fossilized shells.
• retrosnub, trueborns
Source: Wiktionary
Burr"stone`, n.
Definition: See Buhrstone.
Source: Webster’s Unabridged Dictionary 1913 Edition
2 May 2025
(noun) excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
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.
