Dictionary.com
Thesaurus.com

waterpick

American  
[waw-ter-pik, wot-er-] / ˈwɔ tərˌpɪk, ˈwɒt ər- /

noun

  1. a portable electric appliance that uses a stream of water under force to remove food particles from between the teeth and to massage the gums.


Etymology

Origin of waterpick

water + pick 2; earlier as Water Pik a trademark (1963)