Flipper
Pronunciation : Flip"per
Part of Speech : n.
Etymology : [Cf. Flip, Flippant.]
Definition : 1. (Zo?l.)
Defn: A broad flat limb used for swimming, as those of seals, sea turtles, whales, etc.
2. (Naut.)
Defn: The hand. [Slang]
Source : Webster's Unabridged Dictionary, 1913