etymology, entomology

Etymology or etymology means the study of the derivation or origin of a word, or the study of the change in language over time--
The etymology of a word can help us to understand its meaning.
Does this dictionary include the etymology of a word with each entry?
Students find the medieval readings the most difficult part of the etymology course.

Entomology or entomology means the study of insects--
The student brought live beetles in a jar for his report on entomology.
The children are studying entomology, and are particularly interested in the social insects.

Now that you know that, you can say--
"The entry on the etymology of entomology says that it is Greek for the study of insects."