Logophiles will love Merriam Webster's new Time Traveler website. It lets you find the first known use dates of words and terms.
For example, wordie was first used in 1982.
I entered my birth year, 1957, and looked first for Sputnik. Sure enough, it was there. Along with many surprises, including:
- Asian flu
- cognitive dissonance
- doggie bag
- magic mushroom
- one-hit wonder
P.S. The term "time travel" is not in the Merriam Webster dictionary, but is on wikipedia.