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).
1 Tonic water benefits those who wish to cut harder liquor drinks. Unlike normal water, tonic water has a fizz and sweetness necessary to mix with gin.  The 5th benefit of tonic water is of course its water. Water is important for many biological processes in the human body, and tonic water benefits these processes.