A growth medium that incorporates a generic material (e.g. yeast extract) of unknown precise composition

(astronomy) The matter that exists in the space between star systems in a galaxy, including gas, dust, and cosmic rays.

A diffuse plasma that exists between galaxies.

That operates, moves or takes place at a normal speed.

(education, sociolinguistics) A language used in teaching.

(rare) Of medium sophistication or intellectual level; lying between highbrow and lowbrow; middlebrow.

(economics) Forms of money that pass from hand to hand, such as coins and banknotes.

(photography) A photographic format in between full-frame or 35mm (36 × 24 mm) and large format (127 × 102 mm).

(astronomy, plasma physics) The gas and plasma in the region surrounding a galaxy, beyond the galactic disc or ovoid, or interstellar medium (ISM), but within the galaxy's virial radius.

To choose or provide a moderate option between two extremes.