noun Download 🔗Share A wild plant found in Bengal and Assam, Aeschynomene aspera, having a milky-white, spongy pith used for the manufacture of pith helmets and decorative artefacts. Examples : "The craftsman carefully carved the sola into a delicate flower, showcasing the spongy pith's suitability for decorative work. " plant material biology agriculture Chat with AIVocabulary GamePractice Reading