As a deity name
Name 699 of the Durga Sahasranāma — Kula Arnava Tantra / Skanda Purana, as taught by Lord Shiva to Goddess Parvati
As a Hindi name
कोशस्थ · noun · masculine
सुश्रुत के अनुसार पाँच प्रकार के जीवों में से एक । शंख, घोंघा आदि इसी के अंतर्गत हैं । इस जाति के जीव का मांस, मधुर, शीतल, वायुनाशक और कफ बढ़ानेवाला होता है — Śabdasāgara
As a Sanskrit word
Meaning
‘incased’, any shelled insect or animal (as a snail &c.)
Scripturally attested Verified derivationMultiple readings (2)Why this matches what you typed
The spelling you confirmed, कोशस्थ, is itself a dictionary headword — no grammatical transformation stands between what you typed and the meaning above.
Dictionary citations
kośa—stha m. ‘incased’, any shelled insect or animal (as a snail &c.), Suśr.
a chrysalis or pupa, silk-worm in its cocoon, W.
kośastha mfn. (-sthaḥ-sthā-sthaṃ) Sheathed, enveloped in a sheathe, a shell, &c. m. (-sthaḥ) 1 Any shelled insect or animal, as a snail, &c. 2 A pupa or chrysalis. 3 The silk worm in its cocoon. E. kośa, and stha what abides.
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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