styrofoam

Etymology

From the trademark Styrofoam, from -styr- (from polystyrene) + connective -o- + foam.

noun

1. Expanded polystyrene foam, such as is used in cups and packaging.
   A while ago I read your column concerning the effects of hot tea on styrofoam cups. November 4, 1988, Cecil Adams, “The Straight Dope”, in Chicago Reader
   In the past two years, NASA’s Kepler Space Telescope has located nearly 3,000 exoplanet candidates ranging from sub-Earth-sized minions to gas giants that dwarf our own Jupiter. Their densities range from that of styrofoam to iron. 2013 May-June, Kevin Heng, “Why Does Nature Form Exoplanets Easily”, in American Scientist, volume 101, number 3, page 184
   Expanded polystyrene foam—commonly, although incorrectly, called Styrofoam—has been the subject of a protracted battle between New York City officials and large industry players, particularly Dart. August 9 2018, Gerald Porter Jr., Corinne Ramey, “Industry-Backed Group Keeps Fighting Foam Ban”, in The Wall Street Journal