(biology) Each of the two forms of an organism whose life cycle involves alternation of generations, or the fact of such alternation occurring in a given organism.

plural of altarage

A phenomenon that regularly occurs in the city of Venice, Italy, typically during high and spring tide, involving the flooding of the most low-lying areas of Venice.

plural of alternating current

plural of alternate generation

(algebra) An algebra such that every subalgebra generated by two elements is associative.

plural of alto saxophone

A member of the saxophone family of woodwind instruments that is smaller than the tenor saxophone but larger than the soprano saxophone, with a range of D♭₃ to A♭₅ or similar.

plural of alternative hypothesis

plural of altar boy