pleo-, plos-, ploto-, plot-, pluteus- +
(Greek: swim, swimming, swimmer; sail, sailor; float, floating)
Don't confuse this element with another pleo- unit meaning "more, most; full; excessive; multiple".
2. Etymology: Greek pleon, present participle of plein, "to swim, to sail".
2. One of the swimming limbs attached to the pleon or abdomen in Crustacea; also known as a swimmeret.
A swimmeret is defined as an abdominal limb or appendage in many crustaceans, used in respiration and for carrying the eggs in females and usually adapted for swimming.
2. The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods.
2. The free-swimming larva of sea urchins and ophiurans, having several long stiff processes enclosing calcareous rods.