Definitions for "Porpoise"
Any small cetacean of the genus Phocæna, especially Phocæna communis, or Phocæna phocæna, of Europe, and the closely allied American species (Phocæna Americana). The color is dusky or blackish above, paler beneath. They are closely allied to the dolphins, but have a shorter snout. Called also harbor porpoise, herring hag, puffing pig, and snuffer.
A true dolphin (Delphinus); -- often so called by sailors.
A small toothed whale (often used interchangeably with dolphin).
Keywords:  eldred, tradename, ted, scuba, onwards
Porpoise is a tradename for scuba developed by Ted Eldred in Australia and made there from the late 1940's onwards.
To see a porpoise in your dreams, denotes enemies are thrusting your interest aside, through your own inability to keep people interested in you.
Used scientifically to mean the 6 true species of porpoise.