Definition: Relating to the ability of certain materials to generate an electric charge when they are subjected to mechanical stress.

Example: The piezoelectric sensor converts pressure into an electrical signal.

Definition: A type of material that generates an electric charge when it is squeezed or deformed.

Example: The engineer used a piezoelectric sensor to measure pressure changes.

Definition: A device used to measure the pressure of liquids or gases, particularly in situations involving high pressure.

Example: The engineer used a piezometer to monitor the pressure levels in the water reservoir.

Definition: Resembling or shaped like a hair.

Example: The scientist described the structure as piliform, indicating its hair-like appearance.

Definition: Describing something that operates without a pilot or human control.

Example: The new pilotless drone can fly autonomously without any human intervention.

Definition: A hair or hair-like structure found on the surface of a cell or microorganism.

Example: The bacterium was covered in tiny pili that helped it attach to surfaces.

Definition: A very small hole that is made by a pin or similar object.

Example: The camera uses a pinhole to capture images without a lens.

Definition: A type of feather on a bird's wing or a small gear that works with a larger gear.

Example: The eagle spread its pinions wide as it soared through the sky.

Definition: To hold down or restrict movement by binding or cutting, often used in the context of birds to prevent them from flying.

Example: The falconer had to pinion the bird's wings to keep it from escaping.

Definition: Relating to the process by which cells take in small particles or liquids from their surroundings.

Example: The pinocytic activity of the cell allows it to absorb nutrients from its environment.

Definition: A process by which cells take in fluids and dissolved substances by folding in their membrane to form small pockets or vesicles.

Example: During pinocytosis, the cell absorbs nutrients from its surroundings by engulfing liquid.

Definition: A type of subatomic particle that is a meson, which can be neutral, positively charged, or negatively charged, and is made of quarks. It has a mass significantly greater than that of an electron and is involved in the strong force that holds atomic nuclei together.

Example: The pion plays a crucial role in mediating the strong force between nucleons in an atomic nucleus.