18-letter words containing f, l, u, e, r, i
- quarry-tiled floor — a floor covered with square or diamond-shaped unglazed floor tiles
- quarterlife crisis — a crisis that may be experienced in one's twenties, involving anxiety over the direction and quality of one's life
- relative frequency — the ratio of the number of times an event occurs to the number of occasions on which it might occur in the same period.
- return-flue boiler — a fire-tube boiler having flues that collect the combustion gases at the end of the boiler opposite the fire door and pass them through the boiler to an uptake above the fire door.
- safety regulations — regulations or rules that are put in place to ensure a product, event, etc, is safe and not dangerous
- sampling frequency — sample rate
- selenium rectifier — a rectifier consisting of laminated plates of metal, usually iron, that have been coated with selenium on one side, with rectification taking place because the flow of electrons from the conductive metal to the selenium occurs more readily than the flow in the opposite direction.
- self-instructional — pertaining to or constituting learning materials and conditions arranged so that students can proceed to learn on their own with little or no supervision.
- self-preoccupation — the state of being preoccupied.
- self-raising flour — flour with baking powder
- self-understanding — mental process of a person who comprehends; comprehension; personal interpretation: My understanding of the word does not agree with yours.
- shrubby cinquefoil — a small shrub, Potentilla fruticosa, of the rose family, native to the Northern temperate region, having pinnate leaves and numerous, showy, bright-yellow flowers.
- silvery cinquefoil — any of several plants belonging to the genus Potentilla, of the rose family, having yellow, red, or white five-petaled flowers, as P. reptans (creeping cinquefoil) of the Old World, or P. argentea (silvery cinquefoil) of North America.
- soldier of fortune — a person who independently seeks pleasure, wealth, etc., through adventurous exploits.
- spectrofluorimeter — an instrument in which the spectrum of secondarily emitted fluorescent light is used to identify chemical compounds.
- sulfuric anhydride — sulfur trioxide.
- sunflower seed oil — the oil extracted from sunflower seeds, used as a salad oil, in the manufacture of margarine, etc
- to play favourites — to display favouritism
- tufted loosestrife — a primulaceous plant Naumburgia thyrsiflora
- turn in on oneself — to withdraw or cause to withdraw from contact with others and become preoccupied with one's own problems
- ultraviolet filter — a filter used on a lens to absorb ultraviolet radiation that may impart an undesirable blue cast to a photograph.
- universal suffrage — suffrage for all persons over a certain age, usually 18 or 21, who in other respects satisfy the requirements established by law.
- university faculty — a division within a university comprising one subject area, or a number of related subject areas
- uriniferous tubule — a urine-bearing tubule in a nephron of a kidney.
- wildlife sanctuary — an area where wild animals and plants are protected
- xenon hexafluoride — a colorless, crystalline compound, XeF 6 , that melts at 50°C to a yellow liquid, and boils at 75°C.