from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Of, using, or being a technique that photographs a naturally slow process, such as plant growth, on movie film at intervals, so that continuous projection of the frames gives an accelerated view of the process.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. of or relating to a technique in which exposures are taken at fewer intervals than usual so that, on playback, a naturally slow process may be viewed at an accelerated pace
time + lapse (Wiktionary)