a type of galaxy having the shape of a spheroid or ellipsoid, rather than a disk.
The most common type of galaxy, ranging in shape from nearly spherical (classified as E0) to greatly elongated (classified as E7). Elliptical galaxies vary greatly in size and include some of the largest and smallest known galaxies. They do not have spiral arms and have considerably less interstellar gas and dust than spiral galaxies, with little or no star formation taking place within them. Their stars follow individual elliptical orbits around the center of the galaxy. Long thought to be older galaxies which had used up all the material for star formation, it has also been suggested that elliptical galaxies actually form from collisions between spiral galaxies. Compare irregular galaxy, lenticular galaxy, spiral galaxy. See more at Hubble classification system.
[ih-lip-tik-lee] /ɪˈlɪp tɪk li/ adverb 1. in the form of an ellipse. 2. in an manner; by an ellipse. 3. with great economy of words or expression; concisely: to speak elliptically. 4. without sufficient transition or a logical connection between thoughts, ideas, or expressions; ambiguously or cryptically: to jump elliptically from generalities to specifics.
noun, Physics. 1. polarization of an electromagnetic wave in which the vector representing the instantaneous intensity of the electric field describes an elliptical helix in the direction of propagation.
noun 1. an exercise machine like a stationary bike without a seat, so that exercising is done in an upright position, and having pedals that the user moves in an elliptical pattern, believed to minimize strain on the knee joints. noun a piece of stationary exercise equipment used to simulate walking or running without causing […]
noun, Mathematics. 1. one of a class of transcendental functions related to elliptic integrals and analogous to trigonometric functions.