(mycology) A thin layer of tissue which completely surrounds a developing mushroom.

(informal, astronomy, archaic) A galaxy

plural of universal set

plural of expanded universe

In fiction, the extension of a media franchise (i.e. a television show, series of feature films, etc.) with other media (generally comics and original novels), often with the result being that the stories described in the other media are not considered canon in the original.

(logic) The set of all entities over which quantifiers—including "for all" and "there exists"—range.

the Christian belief that all human souls will eventually get to Heaven

plural of parallel universe

(sciences, science fiction) A universe that exists separately alongside another universe, as part of a multiverse.

(international law) A principle whereby a state claims legal jurisdiction over persons whose alleged crimes were committed outside the boundaries of the prosecuting state, regardless of the accused's nationality, country of residence, or other relationship with the prosecuting country.