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13-letter words containing a, t, f, r

  • reflectograph — a type of mechanical instrument used for communication with spirits or the dead
  • reflex-action — Physiology. noting or pertaining to an involuntary response to a stimulus, the nerve impulse from a receptor being transmitted inward to a nerve center that in turn transmits it outward to an effector.
  • refocillation — the restoring of strength by refreshment or revivement
  • reforestation — to replant trees on (land denuded by cutting or fire).
  • reformability — the extent to which something or someone is reformable; the capability or susceptibility to reform
  • reformulation — to formulate again.
  • refractometer — an instrument for determining the refractive index of a substance.
  • refractometry — an instrument for determining the refractive index of a substance.
  • refrigeration — the act or process of refrigerating.
  • refundability — to give back or restore (especially money); repay.
  • reinfestation — the act of infesting; state of being infested.
  • remanufacture — to refurbish (a used product) by renovating and reassembling its components: to remanufacture a vacuum cleaner.
  • retrofittable — to modify equipment (in airplanes, automobiles, a factory, etc.) that is already in service using parts developed or made available after the time of original manufacture.
  • reunification — the process of unifying or uniting; union: the unification of the 13 original colonies.
  • reverse fault — a fault in which the rock above the fault plane is displaced upward relative to the rock below the fault plane (opposed to gravity fault).
  • rhesus factor — Rh factor.
  • river traffic — the boats that sail on a river
  • russification — Russianize (defs 1, 2).
  • safari jacket — bush jacket.
  • safety factor — the ratio of the maximum stress that a structural part or other piece of material can withstand to the maximum stress estimated for it in the use for which it is designed.
  • safety margin — something required to ensure safety
  • safety screen — a screen covering a work area and protecting people and equipment from fire and other danger
  • sassafras tea — a tea made from the aromatic dried bark of the root of the sassafras tree, often used medicinally as a stimulant, diaphoretic, and diuretic.
  • saturated fat — a type of single-bond animal or vegetable fat, as that found in butter, meat, egg yolks, and coconut or palm oil, that in humans tends to increase cholesterol levels in the blood. Compare saturated (def 3).
  • sawtooth roof — a roof composed of a series of small parallel roofs of triangular cross section, usually asymmetrical with the shorter slope glazed.
  • scarfed joint — a lapped joint between two pieces of timber made by notching or grooving the ends and strapping, bolting, or gluing the two pieces together
  • scarification — an act or instance of scarifying.
  • scarlet fever — a contagious febrile disease caused by streptococci and characterized by a scarlet eruption.
  • scimitar foot — any short leg or foot, as to a pedestal table, having the form of an arc tangent to the floor plane.
  • scorification — an assaying process whereby gold or silver is separated from ore by fusion with lead.
  • sea butterfly — any member of the gastropod order Pteropoda, shelled marine mollusks so called for their ability to swim using winglike extensions of the foot.
  • self-apparent — clear and evident without need of further evidence
  • self-betrayal — to deliver or expose to an enemy by treachery or disloyalty: Benedict Arnold betrayed his country.
  • self-catering — holiday accommodation not including meals
  • self-creation — the act of producing or causing to exist; the act of creating; engendering.
  • self-critical — capable of criticizing oneself objectively.
  • self-flattery — praise and exaggeration of one's own achievements coupled with a denial or glossing over of one's faults or failings; self-congratulation.
  • self-ignorant — lacking in knowledge or training; unlearned: an ignorant man.
  • self-portrait — a portrait of oneself done by oneself.
  • self-starting — starter (def 3).
  • self-training — the education, instruction, or discipline of a person or thing that is being trained: He's in training for the Olympics.
  • sergeant fish — cobia
  • shaft encoder — A shaft encoder is a sensor for measuring how fast a shaft rotates.
  • shaft feather — one of the two fletchings on an arrow
  • shape-shifter — a creature or thing that can change shape at will or that does so under certain conditions
  • shelf-stacker — a person whose job is to fill the shelves and displays in a supermarket or other shop with goods for sale
  • short-staffed — A company or place that is short-staffed does not have enough people working there.
  • significatory — serving to signify
  • simplificator — a person who simplifies matters
  • single father — a father who brings up a child or children alone, without a partner.
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