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hardwood glossary

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M. S. D. S.

Stands for Material Safety Data Sheet, a required sheet that lists any hazardous ingredients, safety precautions, and first aid information that a consumer should know about a product.

Manufacturing Defects

Refers to defects that occur during production, not natural blemishes. For example, incorrectly sized boards, improperly squared edges, high moisture content upon arrival, chipped grain, machine burn, and so on.


Mastic A general term that refers to a glue or adhesive.


A term generally used to describe someone who professionally installs flooring.

Medallion (Hardwood)

An artistic centerpiece of a floor that is often used in parquet flooring.

Medullary Rays

A visible characteristic in wood consisting of strips of cells running horizontally up and down the tree, which were used to store and transport the tree's food and nutrients.


Maple Flooring Manufacturers Association


A V-shaped groove formed by cutting the edge of a strip of wood at a 90 angle and then at a 45 angle.


A term used to describe a substance that looks white or similar to milk.


The act of cutting wood into strips, planks, or other desired shape.

Mineral Spirits

A solvent often used to clean dried glue or other stubborn stains.

Mineral Streak

A streak found in wood that can range from black to greenish brown that is a result of mineral matter buildup from the flow of sap.

Mixed Media

A type of flooring that is mostly wood but incorporates other materials such as ceramic, marble, slate, stone, etc.

Moisture Content

A measuring of the amount of moisture in wood or other flooring. It is calculated as a percentage of the weight of the dry wood.

Moisture Meter

A device used to measure the moisture level in flooring.


Finish that is cured by contact with moisture.


Trims that are used to cover the expansion gap or to transition to another flooring surface.

Mosaic Parquet

A type of parquet flooring that forms a mosaic by using small pieces of wood and arranging them in a herringbone design.

Muratic Acid

An acid often used on concrete subfloors to neutralize alkalinity.