A lens that is concave on one surface and convex on the opposite surface.
“UFOs?” What bizarre event spawned the phrase “flying saucer?”
There’s a fresh UFO hullabaloo, and that provides the perfect opportunity to encounter the origin of “flying saucer” and “UFO.” There are no alien autopsies, abductions or crop circles in these stories, but there is no shortage of weirdness. First, here’s the latest extraterrestrial extravaganza. A group of retired Air Force members and UFO researchers held a press conference claiming that aliens not only monitor, …
Retro Words You’ll Probably Never Use Again
Most of these retronyms -- obsolete words and phrases -- are outdated technologies.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.