What is the plural form of medium?

The plural form of "medium" is "media." This term comes from Latin, where "medium" refers to a means or instrument, and "media" indicates the plural of that concept, commonly used in English to refer to various channels of communication, such as print, digital, and broadcast media.

"Media" has become widely adopted in English to describe collective forms of communication and is often seen in contexts such as news media or social media. The other options do not serve as standard plural forms in English: "medi" does not represent a correct pluralization, while "medius," which means "middle" in Latin, is not related in meaning. "Mediums" can be a plural form when referring to individuals who communicate with spirits, but it is less common in the general sense. Therefore, "media" remains the accurate plural form in most contexts.