plural of alterant

Something that causes alteration, that alters.

Altering; gradually changing.

In an alterable manner.

The property of being alterable.

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.

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

(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.