# trisūtra (त्रिसूत्रम्) > Canonical version of this page: https://nighantu.ageayurveda.com/lexicon/trisutra/ An Ayurvedic technical term, rendered into English in 5 different ways. The renderings do not agree, and the difference between them changes what the term is taken to mean. ## Identification | Field | Value | | --- | --- | | Transliteration | trisūtra | | Devanagari | त्रिसूत्रम् | | Also written | trisutra, tri-sutra, trisūtra ayurveda, trisūtrāyurveda | | Category, as gathered | foundational | | Grouped under | Foundations and categories | | Classical citations | 3 | | 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. ### Three core principles of Ayurveda knowledge WHO international standard terminologies on Ayurveda (WHO, 2022) · Term ID ITA-1.3.1, section 1.3 'Defining characteristics of Ayurveda knowledge', printed p. 2. Sanskrit terms given as trisūtrāyurvedaḥ, triskandhaḥ · standard WHO's description: 'The entire narrative of Ayurveda is woven coherently on the logical framework of etiology (hetu), symptomatology (linga) and therapeutics (aushadha).' Recorded as a fact about WHO. Note WHO merges trisūtra and triskandha under one term ID, whereas Charaka Su 1.24 and 1.25 use them in consecutive but distinct verses. Reproduced unaltered and attributed from the WHO International Standard Terminologies on Ayurveda, which is what that licence permits, and deliberately absent from the downloadable dataset, which is CC BY 4.0. ### consisting of three aphorisms Charaka Samhita, tr. Avinash Chandra Kaviratna (1896-1913) · Sutrasthana Lesson I, aphorism 23 (= Su 1.24 modern) · translation Public domain. Kaviratna reads sūtra literally as aphorism, so trisūtra for him is a property of the text (it has three aphorisms), not a conceptual triad. This is a materially different reading from WHO's 'three core principles'. ### of three trunks Charaka Samhita, tr. Avinash Chandra Kaviratna (1896-1913) · Sutrasthana Lesson I, aphorism 24 (= Su 1.25 modern), rendering triskandha · translation Kaviratna's rendering of the companion term triskandha, which WHO folds into the same entry. 'Trunks' preserves the tree metaphor of skandha; 'principles' does not. ### hetu-linga-aushadha / cause, sign, remedy common textbook and journal usage · textbook · our paraphrase of the source, not its words The standard modern expansion, and it is directly supported by the Sanskrit of Su 1.24 (hetuliṅgauṣadhajñānaṃ). Widely presented as parallel to aetiology-diagnosis-treatment in modern research methodology. ### not covered ICD-11 Traditional Medicine Module 2 · classification · our paraphrase of the source, not its words No entity found. TM2 classifies disorders and patterns, not epistemic frameworks. ## The classical passages ### Charaka Samhita Sutrasthana 1 (Dīrghañjīvitīya Adhyāya):24, checked against the source > हेतुलिङ्गौषधज्ञानं स्वस्थातुरपरायणम्| त्रिसूत्रं शाश्वतं पुण्यं बुबुधे यं पितामहः||२४|| tr. none - Sanskrit mūla only · https://www.carakasamhitaonline.com/index.php/Deerghanjiviteeya_Adhyaya The locus classicus. The word trisūtraṃ occurs here, and the verse specifies its content in the compound hetu-liṅga-auṣadha-jñānam, 'knowledge of cause, sign and remedy', described as the refuge of both the healthy and the sick (svasthātura-parāyaṇam), eternal and auspicious, first known by the Grandsire. ### Charaka Samhita Sutrasthana 1 (Dīrghañjīvitīya Adhyāya):25, checked against the source > सोऽनन्तपारं त्रिस्कन्धमायुर्वेदं महामतिः| यथावदचिरात् सर्वं बुबुधे तन्मना मुनिः||२५|| tr. none - Sanskrit mūla only · https://www.carakasamhitaonline.com/index.php/Deerghanjiviteeya_Adhyaya The immediately following verse, using triskandha (three-trunked) of āyurveda rather than trisūtra. The two terms are adjacent but not identical and this pair of verses is the evidence for treating them as distinct. ### Charaka Samhita Sutrasthana Lesson I (= chapter 1):23-24 in Kaviratna's numbering (= 1.24-1.25 modern), checked against the source > Fraught with the knowledge of causes, symp¬ toms, and drugs, the refuge both of the hale and the sick, consisting of three aphorisms, eternal and auspicious, which the Grandsire had (first) discovered,23 that limitless and shoreless Science of Life, of three trunks, the intelligent ascetic, with mind devoted to it, soon enough duly learnt in its entirety, 2 4 tr. Avinash Chandra Kaviratna · https://archive.org/stream/BIUSante_47357/BIUSante_47357_djvu.txt The lawfully quotable English for both verses, showing Kaviratna's 'causes, symptoms, and drugs' for hetu-liṅga-auṣadha and his separate renderings of trisūtra ('three aphorisms') and triskandha ('three trunks'). Hyphenation and the split '2 4' for the verse number are OCR; reproduced as retrieved. ## Not to be confused with - **triskandha.** The adjacent verse's term (Su 1.25). Skandha is a trunk/section; sūtra is a thread or aphorism. WHO merges them under one term ID; Charaka uses them in consecutive verses of different metaphors. Whether they denote the same triad is a question the sources leave open. - **trividha parīkṣā / trividha pramāṇa.** The three means of examination (aptopadesha, pratyaksha, anumana) is a different triad about how knowledge is obtained. Trisūtra is about the structure of the subject matter. - **tristhūṇa / trividha bodhya saṅgraha.** Other numbered triads in Charaka Sutrasthana that are routinely confused with trisūtra in teaching material. - **nidāna pañcaka.** A fivefold diagnostic scheme (nidana, purvarupa, rupa, upashaya, samprapti). Hetu and linga appear in both, which is why the two are conflated, but nidāna pañcaka is a diagnostic procedure and trisūtra is a description of the whole science. ## Renderings that do not hold - three sutras. Reads sūtra as a text-unit and suggests there are three specific aphorisms somewhere in the Samhita. Kaviratna's 'three aphorisms' has the same problem, and is recorded because it is what the quotable translator wrote, not because it is right. - three pillars. Confuses trisūtra with tristhūṇa/trayopastambha (the three supports of life: āhāra, nidrā, brahmacarya), an entirely different triad. This is the commonest error attached to this term. - diagnosis, prognosis, treatment. Substitutes prognosis for liṅga (sign/symptom). The Sanskrit compound is hetu-liṅga-auṣadha and contains no term for prognosis. ## Open questions Recorded rather than resolved. - Whether trisūtra and triskandha denote the same triad. Su 1.24 and 1.25 use them of the same body of knowledge in consecutive verses but with different metaphors, and I did not retrieve a commentator on the point. - Whether the triad is actually stated in Sushruta and Ashtanga Hridaya as the 2026 IAMJ title claims. I did not verify this and it should not be repeated without checking. - Whether NAMASTE codes trisūtra. ## Citation Age Ayurveda Nighantu, "trisūtra", https://nighantu.ageayurveda.com/lexicon/trisutra/, CC BY 4.0. Whole lexicon: https://nighantu.ageayurveda.com/lexicon.json and https://nighantu.ageayurveda.com/lexicon.csv. Educational reference only. A term entry explains what a word means and how it has been translated. Nothing here is advice.