What does barleycorn mean?
A grain of barley, especially one used as a unit of length, equivalent to about 1/3 of an inch. A unit of length, especially one used to measure the length of a horse's hoof.
Example
"The blacksmith used a barleycorn to measure the length of the horse's hoof before shoeing it."
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.