eartip

noun

1. The tip of the external ear.
2. A small earpiece or earplug.
3. The part of an earbud that contours to the ear canal.

   “The shape of the nozzle prevents the use of aftermarket eartips.”

4. The removal of the tip of a cat's ear, done to indicate that the cat has been fixed.

   “a cat with an eartip”

verb

1. To remove the tip of a cat's ear, in order to indicate that the cat has been fixed.