Brachyology

In the words [...of] Acts x. 39. there might be a brachyology, in case the sense were: we are witnesses of all that he did, of this also, that they put him to death. But such an omission is not necessary.

So also in Ps 118²⁷ the preposition עד might include the verb ‘come,’ which connects itself so naturally with ‘until,’ and a poetical mode of expression, which is naturally disposed to vivid brachyology (cf. Ps 118), might discover a self-evident point in the circumstance that not the victims themselves but their blood, the precious part of them (Lv 17¹¹), is at last to touch the alter-horns.

The only trouble is with "over all things;" what is His relation to them? Evidently that of Head also. No other view is admissible exegetically; the question becoming thus a purely grammatical one: Shall we accept a brachyology and understand a second κεφαλην before τη εκκλησια (MEYER, STIER, HODGE approvingly): "gave Him the Head over all things (to be the Head) to the church," or [...]

The author employs a brachyology in the last phrase: the hearers of the phrase "than Abel" [...] will be able to fill this out as "than the blood of Abel" from the mention of "blood speaking" [...] in the preceding phrase.

The expression "being-in-Christ" is, therefore, according to Schweitzer, "merely a brachyology for being partakers in the Mystical Body of Christ."