Media: The word "media" comes from the Latin "medium," which means "middle" or "intermediate". It's the plural form of "medium", referring to the medium through which communication is made. The term "media" began to be used in the context of communication in the 20th century, particularly with the rise of mass communication channels such as newspapers, radio, and television.

Refers to the communication outlets or tools used to store and deliver information or data. These could be traditional media like newspapers, magazines, television, and radio, or new media, such as websites, social media, and email marketing.

In biological and chemical sciences, media (or culture media) refers to the liquid or gel-like substance that supplies essential nutrients for the growth of cells or microorganisms. For example, agar plates used in microbiology are a type of media.

Mix: The word "mix" comes from the Latin "miscere," which means "to mix, mingle, blend; mix up, confuse, confound." It's been used in the English language since the late Middle Ages.

In advertising, the media mix refers to the combination of communication channels a company uses to meet its marketing objectives. For example, a media mix could include TV, print, online, and social media advertising.

Refers to the process of combining different substances in a balanced manner. For instance, to create a specific media for a particular type of cell culture, various substances might need to be mixed together in a specific way.

Matrix: The word "matrix" comes from the Latin "matrix" or "mater" meaning "mother" or "womb". The term was used in the 14th century in English as a name for the womb. It has been used in various other senses in mathematics and science. For example, in mathematics, it has been used to refer to a rectangular array of numbers or other mathematical objects. In biology, it's been used to refer to the material or tissue in between our cells.

A matrix in marketing refers  to a variety of tools that businesses use to evaluate different aspects of their performance. For example, a marketing matrix might be used to analyze a product portfolio (Boston Consulting Group Matrix), customer perception (Perceptual Mapping), or growth strategies (Ansoff Matrix).

In biological sciences, a matrix often refers to the material (or substance) in between a eukaryotic organism's cells, in which more specialized structures are embedded. In the context of tissue engineering, a matrix could be the scaffold that cells grow on to form new tissue.