As a deity name
Name 508 of the Durga Sahasranāma — Kula Arnava Tantra / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
दीर्घनिद्रा · noun · feminine
मृत्यु । मौत । मरण — Śabdasāgara
As a Sanskrit word
Meaning
l˚ sleep
Scripturally attested Verified derivationMultiple readings (2)Why this matches what you typed
The spelling you confirmed, दीर्घनिद्रा, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
dīrgha—nidrā f. l˚ sleep, Ragh. xii, 81
death, Hcar.
dīrghanidrā f. (-drā) Death. E. dīrgha long, and nidrā sleep.
Alternative readings
More than one analysis survives full verification. That ambiguity is real, so we show every reading rather than pick one silently.
Caveats
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