The word hub is a noun. Hub means (1) the central part of a car wheel (or fan or propeller etc) through which the shaft or axle passes, (2) a center of activity or interest or commerce or transportation; a focal point around which events revolve.
The following articles and web pages elaborate on the word hub.
Traditional bicycle wheels contain a central hub surrounded by wire spokes that connect the hub to a circular rim. This bicycle wheelset guide includes links to bicycle wheel suppliers.
Helsinki is the capital city and economic hub of Finland; the city is also known for its beautiful architecture, excellent cafes and restaurants, theaters and galleries, and plentiful shopping.
The following articles provide recent hub-related news.
Malaysian Prime Minister Mahathir Mohamad, with economic development on his mind, made a stop at Chinese tech hub Hangzhou on the east coast ahead of a trip to Beijing billed as an attempt to reset Malaysia's ties with China.
Straits Times. Sunday, 19 Aug 2018 05:00:00 +0800.
Typhoon Rumbia made landfall in the Chinese financial hub of Shanghai early on Friday morning, bringing strong winds and rain, state news agency Xinhua said.
Reuters. Thursday, 16 Aug 2018 21:13:01 -0400.