Routledge Dictionary of Language and Linguistics
Branch of Indo-European consisting of two main branches, Indo-Aryan and Iranian, as well as Dardic.
Characteristics: merger of IE e, o, a to a, which led to the loss of qualitative ablaut and the heavy use of quantitative ablaut (e.g. Skt sádas ‘seat,’ sādáyati ‘he/she sets’) as well as numerous glosses, e.g.
the name which the speakers of these languages used for themselves, 
‘Aryan.’
References
Morgenstierne, G. 1929–56. Indo-Iranian frontier languages, 3 vols. Oslo.
Journal
Indo-Iranian Journal.
Indo-Aryan, Indo-European, Iranian
This is the complete article, containing 79 words
(approx. 1 page at 300 words per page).
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