1) Hindustani music terminology 
Vilambit (Hindi: विलंबित; also called vilambit laya) is an introductory slow tempo, or laya, between 10 and 40 beats per minute, used in the performance of a raga in Hindustani classical music. For major ragas, the vilambit portion generally takes up two-thirds or more of the performance, and is followed by a short drut to conclude t...
The term Vilambit is used to denote the slow speed or tempo of the Tal.