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pinwheel a plastic or paper toy, similar to a windmill, that is pinned to a stick and has a wheel that is spun by the wind or someone's breath.
pioneer someone who is one of the first in a culture to explore or live in a place. [3 definitions]
pious showing love for a god or gods in thought and action; religious. [2 definitions]
pipe1 a tube of metal, plastic, or other material, through which a gas or liquid may flow. [6 definitions]
pipeline a long line of pipes for moving gas or oil from where it is produced to where it is used or sold.
piracy robbery or attack at sea. [2 definitions]
piranha a small fish that lives in fresh water in South America. Piranhas, in groups, often attack and eat much larger animals.
pirate someone who attacks or robs ships at sea. [3 definitions]
Pisces a constellation located between Aquarius and Aries. Pisces is also called the Fish. [3 definitions]
pistachio a green nut with a tan shell that is sometimes dyed red. Pistachios have a sweet taste. [2 definitions]
pistil the portion of a flower where seeds grow. It is the female part of a flower.
pistol a small gun that is held and fired with one hand.
piston a part of an engine or some other machine that moves up and down within a tight sleeve in order to make the machine work.
pit1 a wide, deep hole that either is dug or already in the ground. [5 definitions]
pit2 the hard seed at the center of a cherry, plum, or certain other fruits. [2 definitions]
pitch1 to throw or toss. [11 definitions]
pitch2 a thick, black, sticky material made from coal or wood tar. Pitch is used for paving roads and covering roofs to protect them from water.
pitcher1 a container with a handle and spout, used to hold and pour milk, juice, or other liquids.
pitcher2 the baseball or softball player who throws the ball to the batter.
pitchfork a long, sharp tool that is shaped like a fork and is used to move hay or straw.
pitch in (informal) to help others do something.