lookism
noun
look·ism ˈlu̇-ki-zəm 
variants or less commonly looksism
ˈlu̇k-si-zəm
: prejudice or discrimination based on physical appearance and especially physical appearance believed to fall short of societal notions of beauty
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Lookism and Discrimination
There are a lot of -isms in the English language but most people overlook lookism. It describes the prejudice or discrimination people have toward others because of their appearances. People first used the word in the late 1970s in reference to how people were viewing others who were heavier set. Today the panorama of lookism extends from the "overly" beautiful actor or actress to the homely child. Economists, sociologists, and psychologists alike pay close attention to the lookism that occurs in everyday life and examine how it affects people and society as a whole.
Example Sentences
Recent Examples on the Web Even newborn babies prefer attractive to nonattractive faces, which means lookism may be genetic, said Michael Cunningham, a psychologist and expert on the dynamics of attraction at the University of Louisville. 
Alfred Lubrano, Philly.com, 11 July 2018
Alfred Lubrano, Philly.com, 11 July 2018 Word History
First Known Use
1978, in the meaning defined above