From Hindupedia, the Hindu Encyclopedia
By M. A. Alwar
Sometimes transliterated as: Indrabhesajam, IndrabheSajam, Indrabheshajam
Gender of word
Indrabheṣajam is a neutral form.
It is derived from indraṁ mahat bheṣajam which means a great medicine.
It refers to Ginger 
- Shabdakalpadrumah by Raja Radhakantdev, Varadaprasada Vasu, Haricarana Vasu