Artificial intelligent assistant

valvelet

ˈvalvelet rare.
  Also 9 valvlet.
  [f. valve n. + -let.]
  A small valve.

1793 Martyn Lang. Bot., Valvula, a..Valvelet, or Valvule. [Hence in later Dicts.] 1870 tr. Pouchet's Universe 125 Two large openings, each furnished with two valves or valvlets intended to prevent the reflux of the blood.

Oxford English Dictionary

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