installment
installment , noun
1.
The act of installing; installation.
Take oaths from all kings and magistrates at their installment, to do impartial justice by law.
2.
The seat in which one is placed. [Obsolete]
The several chairs of order, look, you scour;...
Each fair installment, coat, and several crest
With loyal blazon, evermore be blest.
3.
A portion of a debt, or sum of money, which is divided into portions that are made payable at different times; that portion of a debt payed back in any one payment; as, the next installment is due January first. Payment by installment is payment by parts at different times, the amounts and times being often definitely stipulated. — Bouvier
4.
a part of a broadcast serial.
5.
a part of a published serial.
Also: instalment