1 Reverse dictionary. Enter meanings to find the corresponding suffixes (e.g., searching with the word arm will locate the suffixes -humeral and -brachial).  Finding meanings. Enter a in the box and click the Search button.
Re: calorie vs. a food calorie. A food calorie is 1,000 chemistry calories. That did sound a little like a homework question.
Today, the difference between organic and inorganic chemistry boils down to the presence of element carbon. Study of organic chemistry pertains to study of carbon compounds while inorganic chemistry is the study of all non carbon compounds.