A weekly late-night programming block on Japan's Fuji Television, devoted to anime series targeted at audiences lying outside of typical anime-watching demographics. Despite the time slot, series broadcast under the noitaminA flag generally attract a sizable viewership, and have developed a reputation for high quality. noitaminA began as a half-hour slot on Fuji TV, but expanded to one hour for the spring 2010 season. Its official Japanese website is here, with a somewhat less up-to-date English version available as well. The name is "Animation" backwards, in case you're wondering.
Series originally broadcast during noitaminA: