अणु

/əɳu/ aṇu

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the minimum standard of the quantity of sound, which is not perceived by the senses, being equal to one-fourth of a Mātrā; cf. अणोस्तु तत्प्रमाणं स्यात् मात्रा तु चतुराणवात् ॥ see T.Pr. 21.3, V. Pr. 1.60, A.Pr. III.65. Ṛk. tantra, however, defines अणु as half-a-mātrā. cf. अर्धमणु (R.T. 1.41).