From Wiktionary, the free dictionary
Borrowed from Sanskrit षड्ज (ṣaḍja), from षष् (ṣaṣ) + -ज (-ja), literally “generating the six (notes)”. Doublet of खरज (kharaj).
षड्ज • (ṣaḍja) m
- (Indian classical music) the first note of the Indian solfege (सप्तक (saptak)), denoted सा (sā)
- डागरबानी में षड्ज चलयमान मनाया जाता है ― ḍāgarbānī mẽ ṣaḍj calaymān manāyā jātā hai