The phrase "index value" refers to a number that serves as a measure or representation of something. It helps provide an understanding or indication of the overall condition, level, or performance of something. Full definition
The team found that the average glycemic index value of white bread for the study population was 62, placing it in the category of a «medium» glycemic index food. (nmsociety.org)
The glycemic index of a food containing carbohydrates is a gauge of how much it raises blood glucose level compared to pure glucose, which is assigned a glycemic index value of 100. (foodforlife.com)
Because the interest paid on the CD is less than the college cost inflation rate, units are sold at a rate slightly above the current index value for one year of college. (finaid.org)