avaka
Monier-Williams Sanskrit-English Dictionary (2nd ed.)
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p. 96, col. 1.
ávaka m. a grassy plant growing in marshy land (Blyxa Octandra Rich., otherwise called Śaivāla),
MaitrS.
Schmidt Nachträge zum Sanskrit-Wörterbuch
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p. 70, col. 3.
ávaka m. = avakā, Maitr. S. 3, 15, 1.