As a deity name
Name 33 of the Gayatri Sahasranāma — Devi Bhagavata Purana, as taught by Sages
As a Hindi name
No reading on this path — this spelling has no entry in our Hindi sources, and no near neighbour is attested there either. We say so rather than invent one.
As a Sanskrit word
Meaning
(scil. rātri; fr. √ 5. vas, ‘to dwell’, with amā, ‘together’) the night of new moon (when the sun and moon ‘dwell together’), the first day of the first quarter on which the moon i…
Scripturally attestedWhy this matches what you typed
M1 · same meaning "amāvāsyāyai" is the dative of "amāvāsyā" — the same word in a different grammatical case.
M1 · same meaning "amāvāsyāyai" is the dative of "amāvāsya" — the same word in a different grammatical case.
Related forms
Dictionary citations
amā—vāsyā (-vāsyā), f. (scil. rātri; fr. √ 5. vas, ‘to dwell’, with amā, ‘together’) the night of new moon (when the sun and moon ‘dwell together’), the first day of the first quarter on which the moon is invisible, AV.; ŚBr. &c.
a sacrifice offered at that time
amā—vāsya n. [NBD.] neighbourhood, AV. iv, 36, 3 [perhaps for -vāśya, ‘lowing (of cows) at home’, as the word is used together with ā-gara & prati-krośa]
amā—vāsya mfn. born in an amā-vāsyā night, Pāṇ. iv, 3, 30 (cf. āmāvāsya)
Caveats
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