Abbreviation for millimeter, a unit of length in the metric system.

The value that appears most frequently in a set of data or the most common behavior in a population.

A substance that slows down the speed of neutrons in nuclear reactions, often used in nuclear reactors.

Referring to the concentration of a substance in a solution, expressed in moles per liter.

A measure of the concentration of a solute in a solution, expressed in moles per liter.

A type of fungus that grows in multicellular filaments, often found on decaying organic matter.

A unit in chemistry representing 6.022 x 10²³ particles of a substance (Avogadro’s number).

A method of calculating the amount of a substance in a sample based on the number of moles present.

The sperm of fish and some other aquatic animals, used in fertilization.

The resemblance of one organism to another or to an object in the environment, which provides some advantage, often protection from predators.