antimeridianWiktionary 原文英美构词拆解antianti-前缀meridianmeridian词干anti-Against, opposed to. · Counteracting, neutralizing.词源说明From anti- + meridian.释义名词noun1(geography) The reference line at 180° longitude, on the opposite side of earth to the prime meridian.2(geography) A meridian of longitude opposite to any given meridian used as a point of reference.