Freebase(0.00 / 0 votes)Rate this definition: Root nodule. Root nodules occur on the roots of plants that associate with symbiotic nitrogen-fixing bacteria. Under nitrogen-limiting conditions, capable plants form a symbiotic relationship with a host-specific strain of bacteria known as rhizobia.
Ayurvedic health benefits of bottle gourd/lau/ lauki: 1  Ayurveda recommends cooked lauki or bottle gourd for better digestion. It is cooling, calming, diuretic and anti-bilious (reduces bile and stops indigestion).
Gourds can be dipped in a weak bleach solution of one or two cups chlorine bleach to a 5 gallon bucket of water to sterilize the surface and sometimes help prevent rotting. The use of a soft bristled brush will help aide in the removal of the debris and not harm the soft skin of the 'green' gourd.