VD is used to refer to diseases such as syphilis and gonorrhoea which are passed on by sexual intercourse. VD is an abbreviation for `venereal disease'. venereal disease any disease that passes from one person to another during sex = STD
= Design Dive Speed - the maximum structural design speed This is a design speed used to prove safety margins Wind gusts of 25fps must be considered at this speed up to 20,000 feet For aircraft designed to meet normal category load limits, Vd = 1 4Vc, for utility category Vd = 1 5Vc
Note appearing on the consolidated tape indicating that for transactions of less than 5000 shares only the stock symbol and the trading price will be displayed This usually occurs when the tape is running behind because of heavy trading