flippers is a form of:

Flipper



noun
1.
(sea animal's finlike limb used in swimming large flat rubber attachment to the foot for underwater swimming, hand) ព្រុយ (ផ្សោត ។ល។)
ENGLISH MEANING
noun
1.
A broad flat limb used for swimming, as those of seals, sea turtles, whales, etc.
1.
The hand