jāṭharāgni: what the term means and how it is translated
jāṭharāgni जाठराग्नि is an Ayurvedic technical term. It is rendered into English in 6 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 | jāṭharāgni |
|---|---|
| Devanagari | जाठराग्नि |
| Also written | jaṭharāgni (NAMASTE spelling), koṣṭhāgni, pācakāgni, udarāgni, antarāgni, dehāgni |
| Category, as gathered | physiology / core concept |
| Grouped here under | Body: tissues, wastes and channels |
| Classical citations | 4 |
| Citations checked | 2026-10-08 |
How it is translated, and whether the translation holds
Each rendering is given with the source that uses it. The assessment is ours.
Metabolic factors located in the digestive tract
WHO International Standard Terminologies on Ayurveda (2022) · ITA-2.6.3 · terminology-standard
WHO description verbatim: 'Transformative factors in the gastrointestinal tract.' Re-verified against the live IRIS PDF.
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.
disorders of digestive power
NAMASTE / National AYUSH Morbidity Codes (NAMC), Ministry of Ayush · NAMC code DB — jaTharAgnivikAraH / जठराग्निविकारः · terminology-standard
NAMASTE codes the disorder heading, not the physiological term. Note NAMASTE spells the stem जठर- (jaṭhara-), not जाठर- (jāṭhara-); the two spellings are both in circulation and a lexicon should record the variance.
Reproduced unaltered and attributed from the Government of India NAMASTE terminology, 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.
the fire, that burns within a person ... the digestant of food
Sushruta Samhita, tr. Kaviraj Kunja Lal Bhishagratna (1907-1916) · Sūtrasthāna Chapter XXXV (= Su.Sū.35.27), p. 321 · public-domain-translation
Bhishagratna does not transliterate the term; he renders the underlying jāṭharo ... agniḥ periphrastically. There is therefore no public-domain English word-for-word rendering of 'jāṭharāgni'.
metabolic fire
Anc Sci Life 2015 (PMID 26283805) · abstract · secondary-literature
Verbatim from the abstract: 'Jāṭharāgni (metabolic fire)'. Same paper also renders it '(the metabolic agent in Ayurveda)'. Common in the research literature and in direct conflict with WHO's 'digestive tract' localisation.
digestive fire / gastric fire
General textbook usage · secondary-literature · our paraphrase of the source, not its words
The most widespread English rendering. 'Gastric' is too narrow, see distinguishFrom.
no ICD-11 TM2 category found
ICD-11 MMS v2026-01, TM2 · classification · our paraphrase of the source, not its words
TM2 codes disorders, not physiological faculties. Related morbidity appears at SM3B (see agnimandya).
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.
Sushruta Saṃhitā (Sanskrit)Sūtrasthāna 35 (Ātura-upakramaṇīya):27 · checked against the source
जाठरो भगवानग्निरीश्वरोऽन्नस्य पाचकः सौक्ष्म्याद्र सानाददानो विवेक्तुं नैव शक्यते २७
The word jāṭhara occurs here as an adjective qualifying agni ('the jāṭhara agni, lordly and divine, is the cooker of food'), not yet as a fixed compound. This is the closest thing to a saṃhitā-level attestation of the term.
Charaka Saṃhitā (Sanskrit)Cikitsāsthāna 15:39 · checked against the source
अन्नस्य पक्ता सर्वेषां पक्तॄणामधिपो मतः। तन्मूलास्ते हि तद्वृद्धिक्षयवृद्धिक्षयात्मकाः॥३९॥
The doctrine of jāṭharāgni's supremacy, stated without using the word: 'the cooker of food is held to be the lord of all cookers; they are rooted in it, and wax and wane as it waxes and wanes.'
Charaka SaṃhitāCikitsāsthāna 15:39 (Kaviratna prints 38) · checked against the source
That heat which cooks (digests) the food eaten is the prince of all heats whose function is cooking. Indeed, all the other heats have the food-cooking heat for their root. Their increase or decrease depends on its increase or decrease.
Public-domain English for the supremacy doctrine. Kaviratna renders it 'the prince of all heats' and never uses the word jāṭharāgni.
Aṣṭāṅga Hṛdaya (Sanskrit)Śārīrasthāna 3:71 · checked against the source
annasya paktā sarveṣāṃ paktṝṇām adhiko mataḥ | tan-mūlās te hi tad-vṛddhi-kṣaya-vṛddhi-kṣayātmakāḥ || 71 ||
Vāgbhaṭa restates the supremacy doctrine in almost the same words as Charaka (adhiko for Charaka's adhipo). Chapter/verse confirmed by the file's own internal variant markers (3.51dv ... 3.74dv ... 3.75av) bracketing this passage.
Where this term does work in the theory
2 concept records name this term as one of their components. Each gloss is that record's own.
- Agni and digestion as Jatharagni
- The central digestive fire seated in the gut (specifically in the grahani, said in Charaka to sit above the navel); digests ingested food into rasa and waste. Its governance of the other agnis is stated in the text: "all the other heats have the food-cooking heat for their root. Their increase or decrease depends on its increase or decrease" (Ci.15, Kaviratna's verse 38, quoted below).
- Dhatu Formation and the Three Models of Tissue Nutrition as Jatharagni
- The central digestive fire in the gut, held to be the root on which all other fires depend.
Not to be confused with
- agni (general)
- jāṭharāgni is one member of the 13-fold set; agni is the whole category. WHO gives them separate term IDs (ITA-2.6.1 vs ITA-2.6.3).
- pācakāgni / pācaka pitta
- Sushruta's own term for the digesting fire (Su.Sū.21), explicitly a variety of pitta seated between āmāśaya and pakvāśaya. Authors who treat jāṭharāgni and pācakāgni as one word are importing Charaka's framework into Sushruta's.
- grahaṇī
- Grahaṇī is the anatomical seat, not the agent: Ca.Ci.15.56 'agnyadhiṣṭhānam annasya grahaṇād grahaṇī matā'. Kaviratna: 'The duct called Grahani is the seat of the digestive fire'. Confusing the two produces the common error of treating grahaṇī-roga as identical with mandāgni.
- dhātvagni
- jāṭharāgni acts on ingested food in the gut; dhātvagni acts on already-formed tissue. Ca.Ci.15.39 makes jāṭharāgni causally prior, not identical.
Renderings that do not hold
- gastric fire / stomach fire. Localises it to the stomach. The classical seat is the grahaṇī above the navel, at the āmāśaya-pakvāśaya junction (Ca.Ci.15.56; Su.Sū.21), which is duodenal rather than gastric.
- gastric juice / hydrochloric acid. A 19th-20th century equivalence (Bhishagratna's introduction already gestures at it) that cannot carry the doctrine of Ca.Ci.15.39, where jāṭharāgni governs the strength of all the other agnis.
- metabolism. Loses the gastrointestinal localisation that WHO's own gloss insists on ('Transformative factors in the gastrointestinal tract'). PMID 26283805's 'metabolic fire' has this problem.
Open questions
Recorded rather than resolved. Each one is something this entry cannot currently settle.
- Where does the compound jāṭharāgni first appear, Vāgbhaṭa, Cakrapāṇi, Śārṅgadhara, or later?
- Is NAMASTE's जठराग्निविकारः spelling a deliberate variant or a data-entry slip?
- Does any text localise jāṭharāgni to the stomach rather than the grahaṇī?
How to cite this entry
Age Ayurveda Nighantu, jāṭharāgni
, https://nighantu.ageayurveda.com/lexicon/jatharagni/, 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.