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).
Added to this, being high in water content, it induces frequent urinating, which is again helpful for cleaning of the kidneys. Also, the anti oxidants present in watermelon ensure good health of the kidneys for a long time, and reduce signs of premature aging like wrinkles and age spots on the skin. Prevents Heat Stroke: Watermelon is effective in reducing both your body temperature and blood pressure.