Words at Play : Words For Things You Didn't Know Have Names
Definition:
ferrule : the protective point or knob on the far end of an umbrella
Example Sentence:
He used his umbrella as a cane, and with every step planted its ferrule in the ground.
Origin:
Ferrule comes from the Latin viriola, meaning "small bracelet." This makes more sense when
you consider that ferrule is also the term for the metal band at the end of a table leg (or similar
object) that strengthens it or prevents it from splitting.