A projection on a sewer pipe that provides an opening to accept a connection to another pipe or house sewer.

1. The left-hand portion of a decision table, consisting of a single column, and comprising the condition stub and the action stub.

2. A program module that is only partly completed, to the extent needed to fulfill the requirements of other modules in the computer system.

1. A short section of transmission line, open or shorted at the far end, connected in parallel with a transmission line to match the impedance of the line to that of an antenna or transmitter.

2. A solid projection one-quarter-wavelength long, used as an insulating support in a waveguide or cavity.