nidāna: what the term means and how it is translated
nidāna निदान is an Ayurvedic technical term. It is rendered into English in 8 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 | nidāna |
|---|---|
| Devanagari | निदान |
| Also written | nidānam, hetu, nimitta, āyatana, kartṛ, kāraṇa, pratyaya, samutthāna |
| Category, as gathered | nidana |
| Grouped here under | Causation and the course of disease |
| Classical citations | 6 |
| 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.
Etiology
WHO international standard terminologies on Ayurveda (2022) · ITA-4.4.1 · standards body
WHO codes nidānam, hetuḥ, nimittam, āyatanam, kartā, kāraṇam, pratyayam and samutthānam under ONE code, mirroring Charaka Ni. 1.3. Description: 'Etiology generally denotes understanding the causative factor and expression of morbidity. Ayurveda uses several terms as synonyms for etiology, based on the different perspectives under which etiology is understood'. Verified by text extraction of the 608-page 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.
The factors directly or indirectly implicated in the etiology of a disease
WHO international standard terminologies on Ayurveda (2022) · ITA-4.4.1, first gloss in the synonym list · standards body
WHO lists eight glosses against eight Sanskrit synonyms in matching order; the first aligns positionally with nidānam. The alignment is a reading of the PDF table layout, not a labelled statement.
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.
Disease assessment
WHO international standard terminologies on Ayurveda (2022) · ITA-4.3.1 (rogaparīkṣā) · standards body
Description: 'The process of investigating a disease: it is conducted by applying the five diagnostic principles'. Recorded because it names the containing activity, which is the sense in which the section title Nidāna Sthāna uses the word.
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.
something by which disease is ascertained correctly
Charaka Samhita, tr. Avinash Chandra Kaviratna (public domain), translator's footnote · Nidana Sthanam, Lesson I, footnote to the synonym passage · public-domain translation
Kaviratna's etymological gloss, given alongside his statement that nidāna in the wide sense includes all five members. The two senses sit side by side on one page.
causative factors
Charak Samhita New Edition (carakasamhitaonline.com) · Ca. Ni. 1.3 and 1.7 running English · modern scholarly edition
CC BY-NC-SA 4.0 comparator, not quotable as our own. Its Ni. 1.7 rendering: 'Nidana is the cause or etiological factor as described earlier.'
cause
easyayurveda.com rendering of Ashtanga Hridaya Ni. 1.2-3 · AH Ni. 1.2, 1.3a · modern textbook website
In-copyright comparator. Its note distinguishes two senses: 'that which furnishes definite information' (hence the section name) and 'the cause of anything', adding that 'this second usage which is more common'.
causes, aetiology, aetiological factors of the disease
easyayurveda.com rendering of Madhava Nidana 1.4 · MN 1.4 · modern textbook website
In-copyright comparator.
not covered as a diagnostic-method term
ICD-11 Traditional Medicine Module 2 · classification · our paraphrase of the source, not its words
NEGATIVE, AND ONLY PARTLY VERIFIED. TM2 is reported as 529 morbidity codes in 18 chapters under two top-level blocks, Traditional Medicine Disorder and Traditional Medicine Pattern, i.e. disorders and patterns rather than diagnostic vocabulary. I could not confirm directly: icd.who.int/browse11/l-m/en redirects and the search endpoint returned 404 to every query I tried.
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 SamhitaNidāna Sthāna 1 (Jvara Nidāna):3 · checked against the source
इह खलु हेतुर्निमित्तमायतनं कर्ता कारणं प्रत्ययः समुत्थानं निदानमित्यनर्थान्तरम्| तत्त्रिविधम्- असात्म्येन्द्रियार्थसंयोगः, प्रज्ञापराधः, परिणामश्चेति||३||
Eight words are declared anarthāntara (not different in meaning): hetu, nimitta, āyatana, kartṛ, kāraṇa, pratyaya, samutthāna, nidāna. The same verse then makes nidāna threefold: asātmyendriyārthasaṃyoga, prajñāparādha, pariṇāma. Retrieved and string-matched by me on the cited page.
Charaka SamhitaNidāna Sthāna 1 (Jvara Nidāna):7 · checked against the source
तत्र निदानं कारणमित्युक्तमग्रे||७||
Within the five-member list, nidāna is defined narrowly as kāraṇa, the cause. This is the verse that makes nidāna both the name of the whole set and the name of its first member.
Charaka SamhitaNidāna Sthāna 1 (Jvara Nidāna):3 (printed unnumbered in Kaviratna, immediately after his aphorism 1) · checked against the source
Verily, (it should be stated) in this connection that the words 'Hetu,' 'Nimitta,' 'Ayatana,' 'Kartri,' 'Karana,' 'Pratyaya,' 'Samutthana.' and 'Nidana, are expressive of the same meaning.
Public-domain English for the synonym verse. Punctuation errors are scan artifacts, preserved verbatim. The volume self-identifies on the same page as Kaviratna's translation, not the 1949 Gulabkunverba edition.
Charaka SamhitaNidāna Sthāna 1 (Jvara Nidāna):translator's footnote to the synonym passage, not a verse · checked against the source
'Nidana is generally taken to be of much wider signification. It includes 'purvarupa' (symptoms of incubation), 'rupa' or 'linga' (actual symptoms of the disease), 'upajaya' (certainty derived from experimental prognosis), and 'samprapti' (ascertainment of the strength or otherwise of the disease). The word 'nidana' is explained as 'something by which disease is ascertained correctly.'
THE CENTRAL AMBIGUITY, stated explicitly in a public-domain source: nidāna names both the first member and the whole five-member set. Same footnote also distinguishes the eight synonyms in use even while calling them synonymous, e.g. 'Hetu is generally limited to the circumstances that precede.' Kaviratna's 'upajaya' is an OCR degradation of his 'upaçaya'.
Ashtanga HridayaNidāna Sthāna 1 (Sarvaroga Nidāna):3 (first half) · address only, nothing quoted to check
Vagbhata's synonym list differs from Charaka's: nimitta, hetu, āyatana, pratyaya, utthāna, kāraṇa, six, dropping kartṛ and samutthāna in favour of utthāna. Devanagari mūla and verse number sighted on the retrieved page; not quoted, per the rule for texts with no public-domain English.
Madhava Nidana1 (Pañca Nidāna Lakṣaṇa):5 · address only, nothing quoted to check
Madhavakara gives the same six synonyms as Vagbhata: nimitta, hetu, āyatana, pratyaya, utthāna, kāraṇa. Verse number from a modern English rendering on the retrieved page; Sanskrit not sighted for this verse.
Not to be confused with
- nidāna-pañcaka
- The five-member set. Nidāna is its first member AND its name, which is the single commonest confusion in this vocabulary. Kaviratna's footnote states the double sense outright.
- hetu
- Declared anarthāntara with nidāna at Ca. Ni. 1.3, and WHO gives both the same code. But Kaviratna's footnote says 'Hetu is generally limited to the circumstances that precede', and Charaka uses hetu in a wholly different epistemological sense at Vi. 8.33 (a means of knowing), where nidāna is never used.
- Nidāna Sthāna
- The section of a saṃhitā. A textual division, not a concept. 'Nidāna of fever' in a chapter title means the whole diagnostic account of fever, not its cause alone.
- samprāpti
- Nidāna is what acts on the body from outside the pathology; samprāpti is the process inside it. WHO separates them into different sub-chapters (4.4 Etiology, 4.5 Pathology).
- nidānārthakara-roga
- A disease acting as the cause of another disease (WHO ITA-4.8.34; MN 1.15-20 gives the chain jvara to raktapitta to śoṣa). Not a kind of nidāna in the ordinary sense: the causative item here is itself a disease.
- nidāna-parivarjana
- Withdrawal of the causative factor, a treatment principle (WHO ITA-9.1.56). Frequently cited as though it were part of the diagnostic nidāna, which it is not.
Renderings that do not hold
- diagnosis. Reads the section-title sense into the term sense. Charaka's Ni. 1.7 defines nidāna as kāraṇa. Diagnosis is rogaparīkṣā / rogaviniścaya, which WHO codes separately at ITA-4.3.1 and ITA-4.1.1.
- pathology. Confuses cause with process. WHO puts nidāna in 4.4 Etiology and samprāpti in 4.5 Pathology.
- risk factor. A risk factor is a statistical association in a population. Ca. Ni. 1.3's three nidāna are a causal taxonomy (misuse of the senses, error of judgement, the action of time), not population-derived.
- trigger. Loses the distinction WHO codes at ITA-4.4.3 and ITA-4.4.4 between utpādaka-hetu (originating) and vyañjaka-hetu (aggravating/manifesting). 'Trigger' names only the second.
Open questions
Recorded rather than resolved. Each one is something this entry cannot currently settle.
- Whether Sushruta has a corresponding synonym list. I searched Bhishagratna's Sutrasthana volume (OCR full text) and found the kriyākāla framework at Sūtra 21 but no nidāna-synonym verse. That negative needs proper confirmation against the Sanskrit.
- How Chakrapani's commentary reconciles the two senses. Not retrieved.
- Whether NAMASTE codes nidāna and under what English. namaste.ayush.gov.in returns 200 at root but 302 on the terminologies path; the machine-readable data was not reachable.
How to cite this entry
Age Ayurveda Nighantu, nidāna
, https://nighantu.ageayurveda.com/lexicon/nidana/, 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.