Small for gestational age (SGA) babies are those whose birth weight lies below the 10th percentile for that gestational age. Low birth weight (LBW), is sometimes used to define a baby that weighs less than 5 lb 8 oz (2500 g) regardless of gestational age.
Historical Examples. 1  The present writer has collected several hundred local wind namesâand is constantly adding to the list. 2  Because local wind systems dominate the trade winds, these deserts are less stable than other deserts.
Standing waves in wind instruments. Wind instruments produce their sound from the standing waves that resonate in the column of air inside a narrow pipe. In many wind instruments, the pipe is closed at one end and open at the other. The standing waves must have a node at the closed end and an antinode at the open end.