Noun
matrika (plural matrikas)
A mother figure in Indian art.
For example, the mid 8th century Pattadakal pillar in Karnataka has text in both Siddha Matrika script, and an early Telugu-Kannada script; while, the Kangra Jvalamukhi inscription in Himachal Pradesh is written in both Sharada and Devanagari scripts. Source: Internet
Pritam Singh (1992) has also traced the origins of Gurmukhī to the Siddha Matrika. Source: Internet
Siddh Matrika seems to have been the prevalent script for devotional writings in Punjab right up to the founding of Sikh faith, after which its successor Gurmukhī appears. Source: Internet
This theory is confusing as Gurmukhī characters have a very close resemblance with "Siddh Matrika" inscriptions found at some sacred wells in Punjab as G.B Singh notes, one being the hathur inscription dating to just before the brith of Guru Nanak. Source: Internet