(physics, cosmology) A hypothetical world situated in a different dimension of space and time than the real world consisting of the universe known and experienced by human beings.

Alternative form of alternate universe

plural of alter-ego

Alternative spelling of alter ego

(statistics) A rival hypothesis to the null hypothesis. Their likelihoods are compared by a statistical hypothesis test.

(idiomatic, motto) One over all.

The offerings made upon the altar or to a church. / The profit which accrues to the priest, by reason of the altar, from the small tithes.

Counterfactual history, a form of scientific speculation used by historians.

A Turkic language spoken in the Altai Republic, Russia on the border of Mongolia and the People's Republic of China. There is no mutual intelligibility with Northern Altai.

(topology) A knot that has a knot diagram in which, in traveling along the knot, one passes through intersections alternatingly: over, under, over, under, etc.