cedilla: a diacritical mark (,) placed below the letter c to indicate that it is pronounced as an s
diacritical mark: a mark added to a letter to indicate a special pronunciation
body mass index: a measure of someone's weight in relation to height; to calculate one's BMI, multiply one's weight in pounds and divide that by the square of one's height in inches; overweight is a BMI greater than 25; obese is a BMI greater than 30