Etymology

Noun

1. A member of a supposed prehistoric race that lived in caves or holes, a caveman.
2. Anything that lives underground.

   The cave was populated by albino scorpions, blind salamanders, and other troglodytes.

3. A reclusive, reactionary or out-of-date person, especially if brutish.
4. A person who chooses not to keep up-to-date with the latest software and hardware.