Ad-dĕn'dum, n.
n.; pl. ADDENDA. [Lat.] A thing to be added; an appendix.
Addendum circle (Mech.), the distance or space between the pitch line of a gear and the circle touching the ends of the teeth. Rankine.
n.; pl. ADDENDA. [Lat.] A thing to be added; an appendix.
Addendum circle (Mech.), the distance or space between the pitch line of a gear and the circle touching the ends of the teeth. Rankine.