index - a numerical scale used to compare variables with one another or with some reference number. 1  margin of error, margin of safety, safety margin - the margin required in order to insure safety; in engineering the margin of safety is the strength of the material minus the anticipated stress.
Nutty Ways to Celebrate Squirrel Appreciation Day This Year. SQUIRRELS! Whether you love them or loathe them, National Squirrel Appreciation Day, January 21st, is a great time to take a few moments and learn about these nutty animals. If you count flying squirrels we have 10 tree species in North America.
Be it joy or sorrow, success or failure or the best or worst; we share it all with them. An occasion to celebrate such a precious bond; must never go waste. August 7, 2016 is Friendship Day; flood their day with Friendship Day Gifts and let them know that you care. Send gourmet gift baskets, chocolates, fruits, teddy, flowers and many more.