seco - sett
- second
- second anode
- second condenser lamp
- second condenser lens
- second cut
- second deck
- second dog watch
- second engineer
- second gear
- second generation
- second generation copy
- second generation dupe
- second hand
- second harmonic
- second harmonic distortion
- second harmonic injection
- second IF amplifier
- second intermediate frequency
- second ionization potential
- second law
- second local oscillator
- second moment of area
- second motion shaft
- second nearest neighbor
- second nearest neighbour
- second proof
- second surface mirror
- second tap
- second trace echo
- second unit
- second window fiber
- second window fibre
- second-channel frequency
- second-generation computer
- second-order band-stop filter
- second-order bandpass filter
- second-order filter
- second-order high-pass filter
- second-order low-pass filter
- second-order prefilter
