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.
Waterproof Leather: Leather that is treated during the tanning process to resist moisture. Non-moisture wicking leather is tested 50,000 flexes without any water coming through the leather. Waterproof leather is especially effective in work boots and duty boots.