nighantus (nēg·hänˑ·tōōs),

n ancient pharmacology books written between the twelfth and fourteenth centuries, which have information about natural medicines used in Ayurveda.
References in periodicals archive ?
The Nighantus upon which Yaska comments are the most ancient in a long and full tradition of lexicography described in four hundred pages by Vogel in his contribution to Gonda's history of Indian literature.