rasa: what the term means and how it is translated
rasa रस is an Ayurvedic technical term. It is rendered into English in 7 different ways, which is the reason this page exists: the renderings do not agree, and the difference between them changes what the term is taken to mean.
| Transliteration | rasa |
|---|---|
| Devanagari | रस |
| Also written | rasaḥ, rasa (taste), rasa dhatu, shadrasa / ṣaḍrasa, rasa (mercury, rasashastra sense) |
| Category, as gathered | dravyaguna-3 |
| Grouped here under | Pharmacology and the action of substances |
| Classical citations | 5 |
| Citations checked | 2026-10-07 |
How it is translated, and whether the translation holds
Each rendering is given with the source that uses it. The assessment is ours.
Taste
WHO International Standard Terminologies on Ayurveda (2022), PDF mirror (prints ITA- codes) · ITA-1.9.4.1.3 'Taste' description 'Trait of water element.' rasaḥ; ITA-6.2.1.1 'Taste' description 'There are six tastes: sweet, sour, salty, pungent, bitter and astringent. The term also indicates the fundamental structural component of primary circulating nutrient fluid (rasadhatu) as well as mercury.' · comparator
WHO itself flags the three senses (taste, rasa-dhatu, mercury) inside one entry.
Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
Primary circulating nutrient fluid, primary product of digestion
WHO International Standard Terminologies on Ayurveda (2022) · ITA-2.2.4, Sanskrit headword 'rasa-dhātuḥ, rasaḥ' · comparator
The dhatu sense gets its own headword; WHO avoids 'plasma', 'lymph' and 'chyle'.
Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits. It is deliberately absent from the downloadable dataset, which is offered under CC BY 4.0 and invites the modification a NoDerivs licence forbids.
taste; Tastes
Charaka Samhita tr. A. C. Kaviratna, public domain · Su.1 his 63 'The object of the tongue is taste'; his 64 'the sixfold catalogue of tastes'; Su.26 passim 'the six Tastes' · public-domain translation
Stable for the gustatory sense. For the dhatu sense he writes 'Rasa (liquid humour)' and 'the (seven) elements beginning with Rasa or humour' (Su.17 kshaya passage, not verse-verified).
lymph chyle (Rasa)
Sushruta Samhita tr. K. L. Bhishagratna, public domain, via wisdomlib · Su.Su.14 opening: 'giving rise to lymph chyle (Rasa) which is extremely thin or attenuated in its consistency and which forms the essence of the assimilated food' · public-domain translation
Edwardian physiology: 'lymph chyle' is a biomedical identification, not a translation.
taste ... a water-origined principle
Sushruta Samhita tr. K. L. Bhishagratna, public domain, via wisdomlib · Su.Su.42: 'taste is said to be a water-origined principle' · public-domain translation
Gustatory sense; agrees with Charaka Su.1.64 that water (and earth) is the substrate.
rasa (taste)
Gilca & Dragos 2017, eCAM (PMID 28642799) · title/abstract; uses 'ayurvedic rasa' with 'cold' and 'hot' subgroups · modern literature
Research usage keeps the Sanskrit and glosses 'taste'.
Taste (Shad Rasa)
easyayurveda.com 'Six Tastes Of Ayurveda' (Hebbar), modern web textbook · https://www.easyayurveda.com/2016/06/14/taste-shad-rasa/ (title seen in search results only; page not retrieved) · modern web textbook · our paraphrase of the source, not its words
Typical textbook rendering; recorded from the search-result title, not from the page.
The classical passages
Each citation gives its address so a reader can check it in a printed edition, our account of what the passage establishes, and the result of reading it against its source.
Charaka SamhitaSutrasthana 1:Standard 1.64 (carakasamhitaonline); Kaviratna prints 63 · checked against the source
The object of the tongue is taste. Water and earth are the objective existences in which taste inheres. In its manifestation and as regards particular kinds of it, space, air, and light, are also its adjuncts.
The definitional verse: rasa is the object of the tongue (rasana), its substrate is water and earth, and the other three bhutas account for its manifestation and varieties. Sanskrit as retrieved: रसनार्थो रसस्तस्य द्रव्यमापः क्षितिस्तथा| निर्वृत्तौ च विशेषे च प्रत्ययाः खादयस्त्रयः||६४|| (https://www.carakasamhitaonline.com/index.php/Deerghanjiviteeya_Adhyaya).
Charaka SamhitaSutrasthana 1:Standard 1.65; Kaviratna prints 64 · checked against the source
Sweet, sour, salt, pungent, bitter, and astringent, these are regarded as the sixfold catalogue of tastes.
The six rasas. Sanskrit as retrieved: स्वादुरम्लोऽथ लवणः कटुकस्तिक्त एव च| कषायश्चेति षट्कोऽयं रसानां सङ्ग्रहः स्मृतः||६५||.
Charaka SamhitaSutrasthana 26:Standard 26.8 (one clause of a long prose unit); Kaviratna prints 11 · checked against the source
There are six tastes, said the royal sage Varyovida. They are heavy, light, cold, hot, oily, and dry.
In the rasa-number debate Varyovida's 'six rasas' are in fact six gunas (guru, laghu, shita, ushna, snigdha, ruksha); the text itself records the rasa/guna confusion the lexicon must undo. Sanskrit as retrieved: षड्रसा इति वार्योविदो राजर्षिः, गुरुलघुशीतोष्णस्निग्धरूक्षाः| (within ||८||, https://www.carakasamhitaonline.com/index.php/Atreyabhadrakapyiya_Adhyaya). Atreya's ruling is 26.9: षडेव रसा इत्युवाच भगवानात्रेयः पुनर्वसुः, मधुराम्ललवणकटुतिक्तकषायाः॥९॥.
Sushruta SamhitaSutrasthana 42:Sanskrit verse number not established; Bhishagratna prints no verse numbers · checked against the source
taste is said to be a water-origined principle.
Sushruta's chapter on rasa (Rasa-Vishesha-Vijnaniya) makes water the originating bhuta of taste, agreeing with Charaka Su.1.64.
Sushruta SamhitaSutrasthana 14:Sushruta Sutrasthana 14.3 (standard numbering; siva.sh Devanagari ॥३॥). Bhishagratna Ch. XIV, opening paragraph [1] and the first sentence of the following paragraph, wisdomlib doc122906; he prints no verse numbers. · checked against the source
The food is fully digested with the help of the internal heat and ultimately assimilated in the system, giving rise to lymph chyle (Rasa) which is extremely thin or attenuated in its consistency and which forms the essence of the assimilated food. The lymph chyle (Rasa), though running through the whole organism, has its primary seat in the heart, whence it flows through the twenty-four vessels which branch off from the latter (heart) to the remotest parts and extremities of the body.
The dhātu sense: rasa is the subtle essence (sāra) of fully digested food, its seat (sthāna) is the heart, and from the heart it enters the twenty-four dhamanīs to nourish the whole body (Su.Su.14.3: 'तस्य हृदयं स्थानं, स हृदयाच्चतुर्विंशतिधमनीरनुप्रविश्य'). 'Lymph chyle' is Bhishagratna's biomedical identification, not the text's.
Not to be confused with
- guṇa (gurvādi)
- Ca.Su.26.8 records Varyovida calling heavy/light/cold/hot/unctuous/dry 'six rasas'; Atreya rejects this (26.9). Rasa is perceived by the tongue; gunas are inferred from action.
- rasa-dhātu
- The first of seven dhatus (WHO ITA-2.2.4; Su.Su.14 'lymph chyle'). Same word, different category; WHO ITA-6.2.1.1 explicitly warns of the overlap.
- anurasa
- The secondary or after-taste (Ca.Su.26.28 व्यक्तः शुष्कस्य चादौ च रसो द्रव्यस्य लक्ष्यते| विपर्ययेणानुरसो रसो नास्ति हि सप्तमः||२८||).
- rasa (pārada, mercury) and rasaśāstra
- WHO ITA-6.2.1.1 lists mercury as a third sense; ITA-19008 'rasaśāstram' is the alchemical discipline.
- vipāka
- Post-digestive taste; a separate member of the rasapañcaka (WHO ITA-6.2 'rasapañcakam').
- rasāyana
- Rejuvenative therapy; Kaviratna's notes gloss it separately. Not the taste or the dhatu.
Renderings that do not hold
- flavour. Common in popular writing; rasa in the texts is a defined gustatory category with pharmacological entailments (Ca.Su.26), not aroma-plus-taste.
- lymph chyle / plasma (for rasa-dhātu). Bhishagratna's 'lymph chyle' and modern 'plasma' are biomedical identifications; the Sanskrit defines rasa-dhatu functionally (first product of digestion, nourishing). WHO's 'primary circulating nutrient fluid' avoids the identification.
- 'heavy, light, cold, hot, oily, and dry' as tastes. Kaviratna faithfully translates Varyovida's rejected position at Ca.Su.26.8; a reader lifting the sentence without 26.9 would take gunas for rasas.
Open questions
Recorded rather than resolved. Each one is something this entry cannot currently settle.
- Verse-number the Su.Su.14 and Su.Su.42 passages against a Sanskrit Sushruta edition.
- Kaviratna's Su.17 'Rasa (liquid humour)' kshaya passage (his 63) was seen but its chapter and standard verse were not verified from a page header.
How to cite this entry
Age Ayurveda Nighantu, rasa
, https://nighantu.ageayurveda.com/lexicon/rasa/, CC BY 4.0.
The whole lexicon is downloadable from the index.
Machine-readable source: Markdown.
Data exported 2026-10-08.
Educational reference only. A term entry explains what a word means and how it has been translated. Nothing here is advice, and nothing here describes how any condition should be treated.