A homosexual person who studies is qualified in or practices chemistry.

also referred to as a 'Highest Occupied Molecular Orbital'.

(N.B. A Chemistry refers to the study of chemistry, not pharmacy/drugs)

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.