prep

• (medicine) By the, by means of the, via the, through the.
  "Introduce the endoscope per nasum."

pron

• (rare, nonstandard) They (singular). Gender-neutral neologistic third-person singular subject pronoun, coordinate with gendered pronouns he and she.
  "This is the same place the Houghtons came from? The place where someone we interacted with thought of going into law as a profession, decided per couldn't because per was a bdsmer, and most of the USAmerican bdsmers per was discussing it with agreed with per?"
• (rare, nonstandard) Them (singular) Neologistic gender-neutral third-person singular object pronoun, suggested for use in place of him and her.
  "This is the same place the Houghtons came from? The place where someone we interacted with thought of going into law as a profession, decided per couldn't because per was a bdsmer, and most of the USAmerican bdsmers per was discussing it with agreed with per?"

adj

• (rare, nonstandard) Belonging to per, their (singular). Gender-neutral third-person singular possessive adjective, coordinate with gendered his and her.
  "Whereas Christie had flirted with a lesbian identity prior to surgery, following surgery Christie found perself able to pursue per attraction to men, provided they related to per as a non-gendered person."

noun

• (nutrition) Initialism of protein efficiency ratio.
• (stock market) Initialism of price-earnings ratio.