Abstaining from food throughout a day and night is called as Upavasa.
== Synonyms ==
== Synonyms ==
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Various words used synonymously with Upavasa in Samskrt are given below,<blockquote>
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तत्पर्य्यायः । उपवस्तम् २ । इत्यमरः ॥ उपोषितम् ३ उपोषणम् ४ औपवस्तम् ५ । इति तट्टीका ॥
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तत्पर्य्यायः । उपवस्तम् २ । इत्यमरः ॥ उपोषितम् ३ उपोषणम् ४ औपवस्तम् ५ । इति तट्टीका ॥</blockquote>
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The commonly used words include Uposhana, uposhita, upawasta etcIn Ayurveda, the term upavasa is used synonymously with the term LAnghana<blockquote>
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लङ्घनं-उपवासाख्यं,… (Asht. Hrud. Su 8.21)</blockquote>Langhana is also known as Upavasa. Langhana is the term that indicates a method by which lightness is generated in the body. Upavasa where the food intake is restricted performs the same functions thus the words are used interchangeably at many instances.