16-letter words containing f, i

of a certain age — of an unspecified age, but no longer young
of it own accord — If something happens of its own accord, it seems to happen by itself, without anyone making it happen.
off-road vehicle — An off-road vehicle is a vehicle that is designed to travel over rough ground.
offensive weapon — an instrument designed to be used in attack, or an object which may be used in attack
official referee — (in England) a circuit judge attached to the High Court who is empowered to try certain cases, esp where a detailed examination of accounts or other documents is involved
on a war footing — If a country or armed force is on a war footing, it is ready to fight a war.
on the defensive — If someone is on the defensive, they are trying to protect themselves or their interests because they feel unsure or threatened.
on the safe side — as a precaution
on-the-spot fine — a fine that is charged immediately upon being caught and found guilty of a crime
one-way function — (cryptography, mathematics) A function which is easy to compute but whose inverse is very difficult to compute. Such functions have important applications in cryptography, specifically in public-key cryptography. See also: trapdoor function.
open-die forging — Open-die forging is a forging process in which the flow of metal is not kept completely in the die.
operating profit — the profit of a company, etc, after it deducts its operating costs or the costs necessary to conduct the business
order of service — a prescribed form of liturgical service, or of administration of a rite or ceremony
orthoformic acid — a hypothetical acid, HC(OH) 3 , known only in the form of its esters.
ostend manifesto — a declaration (1854) issued from Ostend, Belgium, by the U.S. ministers to England, France, and Spain, stating that the U.S. would be justified in seizing Cuba if Spain did not sell it to the U.S.
out of condition — If someone is out of condition, they are unhealthy and unfit, because they do not do enough exercise.
out of your mind — If you say that someone is out of their mind, you mean that they are mad or very foolish.
outboard profile — an exterior side elevation of a vessel, showing all deck structures, rigging, fittings, etc.
ovals of cassini — the locus of a point x, whose distance from two fixed points, a and b, is such that |x–a| |x–b| is a constant
over-familiarity — thorough knowledge or mastery of a thing, subject, etc.
ovshinsky effect — an effect that turns special types of glassy, thin films into semiconductors upon application of low voltage.
pacific sturgeon — a dark gray sturgeon, Acipenser transmontanus, inhabiting marine and fresh waters along the northwestern coast of North America, valued as a food and sport fish.
packing fraction — Physics. a measure of the stability of an atomic nucleus, equal to 10 4 multiplied by the mass defect and divided by the mass number.
pair of scissors — two-bladed cutting tool
paraprofessional — a person trained to assist a doctor, lawyer, teacher, or other professional, but not licensed to practice in the profession.
partial fraction — one of the fractions into which a given fraction can be resolved, the sum of such simpler fractions being equal to the given fraction: Partial fractions of 5/(x2−x) are 5/(x−1) and −5/x.
partial function — A function which is not defined for all arguments of its input type. E.g. f(x) = 1/x if x /= 0. The opposite of a total function. In denotational semantics, a partial function f : D -> C may be represented as a total function ft : D' -> lift(C) where D' is a superset of D and ft x = f x if x in D ft x = bottom otherwise where lift(C) = C U bottom. Bottom (LaTeX \perp) denotes "undefined".
parts of lindsey — an area in E England constituting a former administrative division of Lincolnshire
pass-band filter — band-pass filter
passive transfer — Immunology. injection of lymphocytes or antibody from an immune or sensitized donor to a nonimmune host in order to impart immunity or test for allergic reactions.
pathetic fallacy — the endowment of nature, inanimate objects, etc., with human traits and feelings, as in the smiling skies; the angry sea.
paulinus of nola — Saint. ?353–431 ad, Roman consul and Christian poet; bishop of Nola (409–431). Feast day: June 22
pearls of wisdom — good advice, wise words
pearly razorfish — See under razorfish.
pension benefits — the benefits that are paid to a person in accordance with his pension scheme
peregrine falcon — a globally distributed falcon, Falco peregrinus, much used in falconry because of its swift flight: several subspecies are endangered.
perfecting press — a rotary press for printing both sides of a sheet or web in one operation.
period furniture — furniture that was made during a particular period in time
persulfuric acid — Also called Caro's acid, permonosulfuric acid, peroxymonosulfuric acid, peroxysulfuric acid. a white, crystalline solid, H 2 SO 5 , used as an oxidizing agent for certain organic compounds.
petrified forest — a national park in E Arizona, containing petrified coniferous trees about 170 000 000 years old
phase difference — the difference between two sinusoidally varying quantities that have the same frequency, measured either as an angle or a time
philip of swabia — 1180?–1208, king of Germany and uncrowned emperor of the Holy Roman Empire 1198–1208 (son of Frederick I).
phosphor fatigue — screen saver
physical fitness — good physical condition
pique oneself on — to be proud of
place of worship — religious house: church, temple
placement office — an office in a university that offers students careers advice and help to find employment
plaster of paris — calcined gypsum in white, powdery form, used as a base for gypsum plasters, as an additive of lime plasters, and as a material for making fine and ornamental casts: characterized by its ability to set rapidly when mixed with water.
play off against — If you play people off against each other, you make them compete or argue, so that you gain some advantage.
point of contact — (networking) (POC) An individual associated with a particular Internet entity (IP network, domain, ASN).

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