For instance, in analytic geometry, a line in the plane is often defined as the set of points whose coordinates satisfy a given linear equation, but in a more abstract setting, such as incidence geometry, a line may be an independent object, distinct from the set of points which lie on it.
Moodle Stands for Modular Object-Oriented Dynamic Learning Environment. Moodle is an open source course management system, orginally developed by Martin Dougiamas.
sulÂ·len. adj. sulÂ·lenÂ·er, sulÂ·lenÂ·est. 1. Showing a brooding ill humor or silent resentment; morose or sulky. 2. Gloomy or somber in tone, color, or portent: sullen, gray skies. 3. Sluggish; slow: the sullen current of a canal.ullen. adjective morose, cross, moody, sour, gloomy, brooding, dour, surly, glowering, sulky, unsociable, out of humour The offenders lapsed into a sullen silence. morose cheerful, cheery, good-humoured, warm, bright, pleasant, sunny, amiable, sociable, genial, chirpy (informal), good-natured, warm-hearted.