small-for-gestational-age infant: an infant whose size and weight are considerably less than the average for babies of the same age
organism: a living thing that has (or can develop) the ability to act or function independently
pop art: a school of art that emerged in the United Kingdom in the 1950s and became prevalent in the United States and the United Kingdom in the 1960s; it imitated the techniques of commercial art (as the soup cans of Andy Warhol) and the styles of popular culture and the mass media