There are multiple definitions:

1. potassium cyanide(English)

   • Potassium, Nomenclature

2. keratoconus(English)

   • a progressive non-inflammatory bilateral corneal ectatic disorder, manifested by characteristic cone-like steepening of the cornea associated with irregular stromal thinning, resulting in a cone-like protrusion and significant loss of vision
   • KC
   • Ophthalmology
   • https://www.ncb…35/#!po=7.14286
   • https://doi.org…-7168-3.00020-9