An elliptical trainer or cross-trainer (also called an X-trainer) is a stationary exercise machine used to simulate stair climbing, walking, or running without causing excessive pressure to the joints, hence decreasing the risk of impact injuries.
https://en.wikipedia.org/wiki/Elliptical_trainer
ElliptiGO trainers are elliptical but not stationary. An elliptical trainer or cross-trainer (also called an X-trainer) is a stationary exercise machine used to simulate stair climbing, walking, or running without causing excessive pressure to the joints, hence decreasing the risk of impact injuries.
https://en.wikipedia.org/wiki/Elliptical_trainer
Full Definition of ELLIPTICAL. 1. : of, relating to, or shaped like an ellipse. 2. a: of, relating to, or marked by ellipsis or an ellipsis b (1) : of, relating to, or marked by extreme economy of speech or writing (2) : of or relating to deliberate obscurity (as of literary or conversational style).
http://www.merriam-webster.com/dictionary/elliptical
el•lip•ti•cal. 1. pertaining to or having the form of an ellipse. 2. pertaining to or marked by grammatical ellipsis. 3. a. characterized by extreme economy of expression in speech or writing.
http://www.thefreedictionary.com/elliptical
Most elliptical trainers work the user's upper and lower body (although some models do not have moving upper body components). Though elliptical trainers are considered to be minimal-impact, they are an example of a weight-bearing form of exercise.
https://en.wikipedia.org/wiki/Elliptical_trainer
An elliptical cross trainer is comparable to a treadmill in its exertion of leg muscles and the heart. Ellipticals produce an intermediate range of leg motion between that of stationary bikes and treadmills.
https://en.wikipedia.org/wiki/Elliptical_trainer
You can get an effective aerobic workout with both an elliptical machine and a treadmill. In general, you can let your fitness goals determine whether you choose an elliptical machine or a treadmill — or a different piece of exercise equipment.
http://www.mayoclinic.org/healthy-lifestyle/fitness/expert-answers/elliptical-machines/faq-20058294
Elliptical trainers first entered the market in the 1990s, invented by Precor. Most elliptical trainers work the user's upper and lower body (although some models do not have moving upper body components).
https://en.wikipedia.org/wiki/Elliptical_trainer
2. a: of, relating to, or marked by ellipsis or an ellipsis b (1) : of, relating to, or marked by extreme economy of speech or writing (2) : of or relating to deliberate obscurity (as of literary or conversational style). — el·lip·ti·cal·ly \-ti-k(ə-)lē\ adverb. See elliptical defined for English-language learners.
http://www.merriam-webster.com/dictionary/elliptical
el·lip·tic. adj. 1. Of, relating to, or having the shape of an ellipse. 2. Containing or characterized by ellipsis.
http://www.thefreedictionary.com/elliptic
what is an eliptic
The ecliptic is of or relating to, or shaped like an ellipse.