Hindoostani

[hin-doo-stah-nee, -stan-ee] /ˌhɪn dʊˈstɑ ni, -ˈstæn i/
noun, adjective
1.
Hindustani.
Also, Hindostani
[hin-doh-stah-nee, -stan-ee] /ˌhɪn doʊˈstɑ ni, -ˈstæn i/ (Show IPA).
British Dictionary definitions for Hindoostani

Hindustani

/ˌhɪndʊˈstɑːnɪ/
noun
1.
the dialect of Hindi spoken in Delhi: used as a lingua franca throughout India
2.
a group of languages or dialects consisting of all spoken forms of Hindi and Urdu considered together
adjective
3.
of or relating to these languages or Hindustan