eir

determiner1

1. •
   (nonstandard, rare) Belonging to em, gender-neutral third-person singular possessive adjective, equivalent to the singular their and coordinate with his and her.

   • Eir sentences would sound smoother since ey wouldn’t clutter them with the old sexist pronouns. And if ey should trip up in the new usage, ey would only have emself to blame. — 1975

noun3

1. •
   Initialism of environmental impact report.
2. •
   (US) Initialism of establishment inspection report: a report issued by the U.S. Food and Drug Administration following the inspection of a facility where goods under the authority of the agency are manufactured, held, or sold.
3. •
   Initialism of excess information rate.