Perceptible through unaided vision; visible without the use of a powerful magnifying instrument, or with only the assistance of a pocket-lens: used in contrast to microscopic, with reference to objects or investigations in regard to which the use of a microscope is not required: as, the megascopic constituents of a rock; the megascopic structure of the brain; a megascopic examination of an object. Also macroscopic, macroscopical.