medium

nouns

a means or instrumentality for storing or communicating information
is a type of (narrower)
an artifact (or system of artifacts) that is instrumental in accomplishing some end
the surrounding environment
"fish require an aqueous medium"
is a type of (narrower)
the area in which something exists or lives
"the country--the flat agricultural surround"
an intervening substance through which signals can travel as a means for communication
is a type of (narrower)
the activity of communicating; the activity of conveying information
"they could not act without official communication from Moscow"
(bacteriology) a nutrient substance (solid or liquid) that is used to cultivate micro-organisms
a liquid with which pigment is mixed by a painter
is a type of (narrower)
a substance that is liquid at room temperature and pressure
(biology) a substance in which specimens are preserved or displayed
domain category
the science that studies living organisms
is a type of (narrower)
the real physical matter of which a person or thing consists
"DNA is the substance of our genes"
an intervening substance through which something is achieved
"the dissolving medium is called a solvent"
is a type of (narrower)
the real physical matter of which a person or thing consists
"DNA is the substance of our genes"
a state that is intermediate between extremes; a middle position
"a happy medium"
is derived from
is a type of (narrower)
the way something is with respect to its main attributes
"the current state of knowledge"; "his state of health"; "in a weak financial state"
someone who serves as an intermediary between the living and the dead
"he consulted several mediums"
(usually plural) transmissions that are disseminated widely to the public
an occupation for which you are especially well suited
"in law he found his true metier"

adjectives

around the middle of a scale of evaluation
"an orange of average size"; "intermediate capacity"; "medium bombers"
(meat) cooked until there is just a little pink meat inside
is similar to
having been prepared for eating by the application of heat