Brhat Trayi
three early Sanskrit encyclopedias of medicine

The Bṛhat-Trayī, literally translated as "The Great Triad (Of Compositions)", refers to three early Sanskrit encyclopaedias of medicine, which are the core texts of the indigenous Indian medical system of Ayurveda. These are contrasted with the Laghu-Trayī or the "lesser triad", a secondary set of later authoritative compositions.
This classification cannot be found in works earlier than about 1900. It was first devised probably at some time in the early twentieth century, although its earliest use has not yet (2024) been identified. The classification is not known to Sanskrit authors. It is part of the modern creation of a formal canon for ayurvedic literature.
There are older, authoritative medical encyclopaedias that are not included in the Bṛhat-Trayī, for example the Bheḷa-saṃhitā.
Overview
The following three works constitute the Bṛhat-Trayī:
Charaka Samhita (चरकसंहिता) was composed by Agnivesha (अग्निवेश) and later edited by Charaka (चरक).
Sushruta Samhita (सुश्रुतसंहिता) was composed by Sushruta (सुश्रुत).
Ashtanga Hridayam Samhita (अष्टाग्ङहृदयसंहिता) was composed by Vagbhata (वाग्भट) (fl.
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The date and method of observation matter as much as the stated conclusion, especially where classification or consensus has changed. The source revision retrieved here is dated Jan 17, 2025. The linked authority identifier is Q335258. None of the 0 selected statements returned an explicit reference. The first chronological checks are 1900 and 2024.
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