Airy disk (Science: microscopy) The image of a bright point object as focused by a lens system. With monochromatic light, it... Read More
Brood 1. The young birds hatched at one time; a hatch; as, a brood of chicken. As a hen doth gather her brood under her... Read More
phantom That which has only an apparent existence; an apparition; a specter; a phantasm; a sprite; an airy spirit; an ideal... Read More
