Definition: Relating to a specific type of crystal structure change that occurs without diffusion, often seen in certain minerals and materials.

Example: The steel's martensitic structure gives it exceptional hardness and strength.

Definition: Relating to the planet Mars or its imagined inhabitants.

Example: Scientists are studying Martian soil samples to learn more about the planet.

Definition: A region on the moon with denser rock than the surrounding area, which creates a stronger gravitational pull.

Example: The spacecraft's trajectory was affected by the mascon beneath the lunar surface.

Definition: A device that produces and amplifies electromagnetic waves, particularly in the microwave range, by using the natural oscillations of atoms or molecules.

Example: The scientist used a maser to conduct experiments on microwave radiation.

Definition: A person who wears a mask, often during a party or event where people dress up in costumes.

Example: At the masquerade ball, each masker wore a unique and colorful mask.

Definition: The act of hiding or covering something, often to prevent it from being seen or noticed.

Example: The artist used masking to create a stunning visual effect in her painting.

Definition: Relating to a large number of people or things, often in a collective or widespread manner.

Example: The concert attracted a mass audience, filling the stadium to capacity.

Definition: A large amount or collection of something that is not specifically defined, often referring to a group of parts that come together to form a whole.

Example: The artist used a mass of colors to create a vibrant painting.

Definition: To gather or combine things into a large group or mass.

Example: The workers will mass the supplies in the storage room before the event.

Definition: A strong muscle located in the cheek that helps to close the jaw when chewing food.

Example: The masseter is one of the main muscles used for chewing.

Definition: Relating to the masseter muscle, which is responsible for chewing and moving the jaw.

Example: The masseteric nerve is important for the function of the jaw.

Definition: A yellow powder made of lead monoxide, often used as a pigment in paints and other materials.

Example: The artist chose massicot for its vibrant yellow color in the painting.