Medicine Buddha Healing Center Wiki – Namo Amitabha Buddha – http://www.ayurveda-institute.org
tejas - The subtle essence of fire (agni) and pitta dosha, tejas governs digestion on both subtle and gross levels; the energy of intelligence, discrimination, and of all bodily fire; gives luminosity, brightness, brilliance, enthusiasm, passion; solar energy.
Vaidya Vasant Lad, Textbook of Ayurveda Volume 1, 2001: p. 312