13-letter words containing f, o, t, b
- optical fiber — optical fibre
- optical fibre — (communications) (fibre optics, FO, US "fiber", light pipe) A plastic or glass (silicon dioxide) fibre no thicker than a human hair used to transmit information using infra-red or even visible light as the carrier (usually a laser). The light beam is an electromagnetic signal with a frequency in the range of 10^14 to 10^15 Hertz. Optical fibre is less susceptible to external noise than other transmission media, and is cheaper to make than copper wire, but it is much more difficult to connect. Optical fibres are difficult to tamper with (to monitor or inject data in the middle of a connection), making them appropriate for secure communications. The light beams do not escape from the medium because the material used provides total internal reflection. See also FDDI, Optical Carrier n, SONET.
- orbitofrontal — Located in the frontal lobes above the orbits of the eyes.
- osteofibrosis — loss of calcium from the bones, causing them to become fragile
- out of bounds — Sports. being beyond or passing the limits or boundaries of a field, course, etc., marking the area within which the ball, puck, or the like is legally in play.
- out of breath — the air inhaled and exhaled in respiration.
- out-of-bounds — Sports. being beyond or passing the limits or boundaries of a field, course, etc., marking the area within which the ball, puck, or the like is legally in play.
- owl butterfly — any of several South American nymphalid butterflies of the genus Caligo, especially C. eurylochus, having a spot like an owl's eye on each hind wing.
- plebification — the act of making popular or vulgar
- prefabricator — someone who or an organization that prefabricates
- profitability — yielding profit; remunerative: a profitable deal.
- rabbit's foot — the foot of a rabbit, especially the left hind foot carried as a good-luck charm.
- reformability — the extent to which something or someone is reformable; the capability or susceptibility to reform
- 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.
- robert fulton — Robert, 1765–1815, U.S. engineer and inventor: builder of the first profitable steamboat.
- rule of thumb — a general or approximate principle, procedure, or rule based on experience or practice, as opposed to a specific, scientific calculation or estimate.
- self-begotten — a past participle of beget.
- self-doubting — lacking in confidence
- strombuliform — in the shape of a coil
- sulfur-bottom — blue whale.
- tablespoonful — the amount a tablespoon can hold.
- the better of — having recovered from
- thereinbefore — before that
- to bear fruit — If the effort that you put into something or a particular way of doing something bears fruit, it is successful and produces good results.
- transformable — to change in form, appearance, or structure; metamorphose.
- tubuliflorous — having the corolla tubular in all the perfect flowers of a head, as certain composite plants.
- uncomfortable — causing discomfort or distress; painful; irritating.
- uncomfortably — causing discomfort or distress; painful; irritating.
- unforgettable — impossible to forget; indelibly impressed on the memory: scenes of unforgettable beauty.
- unforgettably — impossible to forget; indelibly impressed on the memory: scenes of unforgettable beauty.
- water buffalo — a buffalo, Bubalus bubalis, of the Old World tropics, having large, flattened, curved horns: wild populations are near extinction.
- webfoot state — Oregon (used as a nickname).
- what about/of — You use what about or what of when you introduce a new topic or a point which seems relevant to a previous remark.
- woulfe bottle — a bottle with more than one neck, used for passing gases through liquids
- zombification — The act or process of zombifying.