from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. A taxonomic subclass within the class Insecta — the wingless insects.
from The Century Dictionary and Cyclopedia
- A group of insects including only the order Thysanura, which contains wingless forms only that are supposed to have descended from wingless ancestors.
New Latin, from Ancient Greek απτέρυγος ("wingless") (Wiktionary)