Pounds per square inch. The pound per square inch or, more accurately, pound-force per square inch (symbol: lbf/in2; abbreviation: psi) is a unit of pressure or of stress based on avoirdupois units. It is the pressure resulting from a force of one pound-force applied to an area of one square inch:
small for gesÂ·taÂ·tionÂ·al age. Infant whose birth weight is below the tenth percentile for gestational age. small for gestational age. SGA. 1. Term describing an infant whose birth weight is at or below the 10th percentile, as correlated with the number of weeks in utero on the intrauterine growth chart.
BMI stands for Body Mass Index. This is a numerical value of your weight in relation to your height. A BMI between 18.5 and 25 kg/mÂ² indicates a normal weight. A BMI of less than 18.5 kg/mÂ² is considered underweight. A BMI between 25 kg/mÂ² and 29.9 kg/mÂ² is considered overweight. A BMI of 30 kg/mÂ² or higher is considered obese.