Chambers 20th Century Dictionary(0.00 / 0 votes)Rate this definition: 1  Rock. rok, n. a large mass of stone: (geol.) a natural deposit of sand, earth, or clay: that which has the firmness of a rock, foundation, support, defence: (Scot.) a distaff: a hard sweetmeat.âv.t. to throw stones at.âns.
Since B-vitamins can be somewhat activating, it is best to take a multivitamin in the morning or afternoon. Minerals such as calcium and magnesium that serve as natural muscle relaxants can be taken in the evening to ensure a good nightâs sleep.
Vitamin D is best vitamin supplement for your health and it is fortified in your body when you are outside in sunâs rays. But often you will not go outside causing vitamin D levels to drop. This can be dangerous for you as lack of vitamin D can lead to osteoporosis.itamins A, C and E are best vitamin supplements crucial for older age. Vitamin A promotes healthy skin and prevents blindness. Vitamin C is the best vitamin supplement which helps the body to use iron and heals the wounds efficiently.