संस्‍कृतशब्‍दकोशः

त्र्यायुष

त्रिविध जीवन-शक्ति

threefold vital power, threefold period of life

Monier–Williams

त्र्यायुष — {āyuṣá} n. (Pāṇ. 5-4, 77) threefold vital power ('threefold period of life, i.e. childhood, youth, and old age' Sch.) VS. iii, 62##xii, 9, 1, 8