Essential nutrients refers to classes of nutrients found in food. Essential nutrients are simply those that are vital for the normal growth, maintenance and development of the body. There might be a slight confusion about essential nutrients that must be addressed.
Definition of waterproof for English Language Learners. : 1  designed to prevent water from entering or passing through. : 2  designed so that water alone will not remove it.
Simple explanation: What is typically referred to as waterproof incorporates some sort of membrane (PTFE or polyurethane) built into the jacket. Water-resistant is typically a treatment applied to the exterior of the jacket to keep water from soaking in.