Merriam-Webster Collegiate Dictionary - disjunct

 I. adjective  Etymology: Middle English, from Latin ~us, past participle of disjungere to disjoin  Date: 15th century marked by separation of or from usually contiguous parts or individuals: as  a. discontinuous  b. relating to melodic progression by intervals larger than a major second — compare conjunct  II. noun  Date: 1921  1. any of the alternatives that make up a logical ~ion  2. an adverb or adverbial (as luckily in “Luckily we had an extra set” or in short in “In short, there is nothing we can do”) that is loosely connected to a sentence and conveys the speaker's or writer's comment on its content, truth, or manner — compare adjunct 2b