American Heritage Dictionary
(1)
Century Dictionary
(3)
GNU Webster's 1913
(1)
WordNet
(1)
Elsewhere on the web
On every minute and half-minute, each satellite transmits its notion of the precise time and its health, followed by its location and a path in orbit that's valid for as long as four hours (the ephemeris, pluralized ephermerides).— Ars Technica
Harmony is a program that plots an astronomical ephemeris into and renders its data to an AU-format soundfile, all based upon theories first presented in Johannes Kepler's famous— Linux Journal - The Original Magazine of the Linux Community
Psychics Online Daily Horoscopes Astrologer Vedic Astrology Jyotish matrimonial ephemeris career monthly weekly yearly horoscope yoga Provides weekly and monthly horoscopes using astrology, numerology and Vedic astrology.— xml's Blinklist.com
Follow up It is feasible to put such ephemeris data on the web so it can be loaded into mobile GPS devices.— We Blog A Lot

American Heritage Dictionary (1)
Century Dictionary (1)
Bubble size: how much this word was used in a year
Bubble height: used more or less than expected, vs. all uses evenly distributed
You can expect to see this word about once a year.