simple past tense and past participle of alternate

plural of alternant

Alternating from one row of a matrix to another. / (geology) Composed of alternate layers, like certain rocks.

(linguistics) An alternate form or allomorph. / (mathematics) A determinant which is an alternating function.

(obsolete) Acting by turns; alternate.

Alternation.

plural of alternance

(archaic) alternation / The concept that there exist alternate worlds or universes to the one in which we live.

plural of alternity

present participle of alternize