A way of displaying the wave-form on a seismic record, in which the positive component of the wave is shown blacked in, and the negative-polarity component is absent, unless the VAR display is in the wiggle-trace mode.
Variable-area display
- foot
- foot-and-mouth disease
- footloose industry
- foot of the perpendicular
- Foot, Philippa (1920–2010)
- footpoint
- footprint
- footprinting
- foot restraint
- footwall
- for all
- foram
- foramen
- foramen magnum
- foramina
- foraminifera
- foraminiferan
- Foraminiferida
- foramol
- forams
- forb
- Forbes, George William (1869–1947)
- forbidden band
- forbidden line
- forbidden transitions