Bollywood is the sobriquet of the Hindi language film industry, based in Mumbai, India. The term is often incorrectly used to refer to the whole of Indian cinema; however, it is only a part of the large Indian film industry, which includes other production centres producing films in multiple languages. Bollywood is one of the largest film producers in India and one of the largest centres of film production in the world. It is more formally referred to as Hindi cinema.
The name "Bollywood" is a portmanteau derived from Bombay (the former name for Mumbai) and Hollywood, the center of the American film industry. However, unlike Hollywood, Bollywood does not exist as a physical place. Though some deplore the name, arguing that it makes the industry look like a poor cousin to Hollywood, it has its own entry in the Oxford English Dictionary.

The naming scheme for "Bollywood" was inspired by "Tollywood", the name that was used to refer to the cinema of West Bengal. Dating back to 1932, "Tollywood" was the earliest Hollywood-inspired name, referring to the Bengali film industry based in Tollygunge, Calcutta, whose name is reminiscent of "Hollywood" and was the center of the cinema of India at the time.[8] It was this "chance juxtaposition of two pairs of rhyming syllables," Holly and Tolly, that led to the portmanteau name "Tollywood" being coined. The name "Tollywood" went on to be used as a nickname for the Bengali film industry by the popular Kolkata-based Junior Statesman youth magazine, establishing a precedent for other film industries to use similar-sounding names, eventually leading to the term "Bollywood" being coined. However, more popularly, Tollywood is now used to refer to the Telugu Film Industry in Telangana & Andhra Pradesh. The term "Bollywood" itself has origins in the 1970s, when India overtook America as the world's largest film producer. Credit for the term has been claimed by several different people, including the lyricist, filmmaker and scholar Amit Khanna, and the journalist Bevinda Collaco.
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