21-letter words containing l, f, r, i, c
- social stratification — the act or an instance of stratifying.
- split-screen facility — a facility allowing different scenes to be shown on screen at the same time
- statistical inference — the theory, methods, and practice of forming judgments about the parameters of a population, usually on the basis of random sampling
- surface of revolution — a surface formed by revolving a plane curve about a given line.
- tetrabromofluorescein — eosin (def 1).
- the flickertail state — a name for the state of North Dakota
- the rock of gibraltar — a limestone promontory at the tip of S Spain
- thermoelectric effect — the production of an electromotive force in a thermocouple.
- traffic control tower — an elevated structure for the visual observation and control of the air and ground traffic at an airport
- university of iceland — (body, education) The Home of Fjolnir.
- virginia (rail) fence — a zigzag fence made of rails laid across one another at the ends
- volumetric efficiency — the ratio of fluid delivered by a piston or ram pump per stroke to the displacement volume of the piston or ram
- volunteers of america — a religious reform and relief organization, similar to the Salvation Army, founded in New York City in 1896 by Ballington Booth, son of William Booth, the founder of the Salvation Army. Abbreviation: VOA.
- warm silence software — A small company run by(?) Robin Watts, producing software for the Acorn Archimedes.