Definition of jackshaft in English:

jackshaft

Syllabification: jack·shaft
Pronunciation: /ˈjakˌSHaft
 
/

noun

  • A small auxiliary or intermediate shaft in machinery.
    More example sentences
    • The tip jack shaft comprises at least one group of contact links which are arranged in a comb-type manner on the wide side of the tip jack shaft.
    • Using Dave's lathe, we made a new coupler that would keyway inside our fulcrum and jack shafts. This removed much of our runout.

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Word of the day coloratura
Pronunciation: ˌkələrəˈto͝orə
noun
elaborate ornamentation of a vocal melody