The New York Stock Exchange started out as a coffee house.
subring (plural subrings)
(algebra) a ring which is contained in a larger ring, such that the multiplication and addition on the former are a restriction of those on the latter
If the larger ring contains a multiplicative identity, certain authors also require that the identity also be contained in the subring.
• ideal
• Burgins
Source: Wiktionary
2 May 2025
(noun) excavation consisting of a vertical or sloping passageway for finding or mining ore or for ventilating a mine
The New York Stock Exchange started out as a coffee house.