plural of auxiliary power unit

(grammar) The auxiliary verb that is combined with a past participle to form a compound perfect tense: in English, the verb have; in French, German, and Danish either the equivalent of have or the equivalent of be, depending on the verb.

(computing) Synonym of secondary storage

(phycology) Exhibiting further enlargement of segments formed by secondary growth after their initial formation, so that filaments have a conspicuously greater diameter than the apical cell that generated them.

Misspelling of auxiliary.