addendum circle

1 definition found

addendum circle - Collaborative International Dictionary of English v.0.48 :

  Addendum \Ad*den"dum\, n.; pl. Addenda. [L., fr. addere to
     add.]
     A thing to be added; an appendix or addition.
     [1913 Webster]
  
     Addendum circle (Mech.), the circle which may be described
        around a circular spur wheel or gear wheel, touching the
        crests or tips of the teeth. --Rankine.
        [1913 Webster]