What does the word porpoise mean?

Usage examples for porpoise

  1. On again sailing north in the Porpoise, he was wrecked on the Barrier Reef. – Terre Napoleon A history of French explorations and projects in Australia by Ernest Scott
  2. Now Dr. Porpoise put a plaster on the little oyster's chest and a blister at her feet. – A Little Book of Profitable Tales by Eugene Field