from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. of, related to, or produced by photochromism
- adj. Relating to the part of a molecule responsible for its photochromism
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to photochromy; produced by photochromy.
from The Century Dictionary and Cyclopedia
- Same as photochromatic.
Sorry, no etymologies found.
By the way, the "photochromic" sun specs which darken under UV exposure aren't quite the miracle claimed by their makers.
Video: Researchers in Japan are reporting development of a new so-called 'photochromic' material that changes color thousands of times faster than conventional materials when exposed to light.
Researchers in Japan are reporting development of a new so-called "photochromic" material that changes color thousands of times faster than conventional materials when exposed to light.
April 28th, 2009 WASHINGTON - A revolutionary 'photochromic' material developed by Japanese researchers changes colour instantaneously when exposed to light.
If he's in and out of buildings all day, he wears photochromic lenses, which get darker when exposed to ultraviolet rays but remain light indoors—a good choice for those with prescription lenses.
Firm Reaches Settlement Over Business Practices The Federal Trade Commission said Transitions Optical Inc., the leading maker of photochromic eyeglass lenses that darken in sunlight, has agreed to cease certain business practices that the agency alleged were anticompetitive.
The agency said photochromic lenses account for about 20% of all corrective eyeglass lenses bought by U.S. consumers, with sales totaling about $630 million at the wholesale level.
My black-framed pair came with a gray shatterproof, polycarbonate lens and two sets of spare lenses, clear and brown, that are not photochromic, as well as a nicely designed zipper case to keep the whole package protected.
But the real kicker is the photochromic housing that adapts to ambient light.
Transitions® Optical - the worldwide leader in photochromic lenses - offer a convenient option for glasses wearers by preventing juggling between sunnies and specs when moving from indoors to out.