12-letter words containing a, d, i, p, o, e
- pteridomania — an excessive enthusiasm for ferns
- pteroic acid — a crystalline acid found in spinach
- pyridoxamine — a metabolic form of pyridoxine
- pyritohedral — of or relating to a pyritohedron
- radiographer — X-ray technician
- radioisotope — a radioactive isotope, usually artificially produced: used in physical and biological research, therapeutics, etc.
- radiotherapy — treatment of disease by means of x-rays or of radioactive substances.
- railroad pen — a ruling pen for drawing two parallel lines.
- rapeseed oil — a brownish-yellow oil obtained by expression from rapeseed and used chiefly as a lubricant, an illuminant, and in the manufacture of rubber substitutes.
- readaptation — the act of adapting.
- reciprocated — to give, feel, etc., in return.
- respondentia — a loan upon a ship's cargo, which is repaid with interest if the ship reaches its destination, and if the ship does not, the loan is not repaid
- ripe old age — advanced age
- saddle point — a point at which a function of two variables has partial derivatives equal to zero but at which the function has neither a maximum nor a minimum value.
- safe-deposit — providing safekeeping for valuables: a safe-deposit vault.
- sapindaceous — belonging to the Sapindaceae, the soapberry family of plants.
- shadow price — the calculated price of a good or service for which no market price exists
- siderography — the art or technique of engraving on steel.
- speedboating — the act, practice, or sport of traveling in a speedboat.
- spermatocide — spermicide.
- spermatozoid — a motile male gamete produced in an antheridium.
- spit-roasted — cooked on a spit
- spotted tail — (Sinte-galeshka) 1833?–81, Brulé Sioux leader.
- stride piano — a style of jazz piano playing in which the right hand plays the melody while the left hand plays a single bass note or octave on the strong beat and a chord on the weak beat, developed in Harlem during the 1920s, partly from ragtime piano playing.
- sulphadoxine — an antibiotic drug of the sulphonamide group, commonly used in combination with pyrimethamine to treat malaria, and in combination with various drugs to treat certain infections
- sulphonamide — any of a class of organic compounds that are amides of sulphonic acids containing the group –SO2NH2 or a group derived from this. An important class of sulphonamides are the sulfa drugs
- superordinal — relating to the superorder
- table tripod — a low mount or stand for a camera.
- trepidations — tremulous fear, alarm, or agitation; perturbation.
- trepidatious — tremulous fear, alarm, or agitation; perturbation.
- triadelphous — (of stamens) united by the filaments into three sets or bundles.
- trial period — time during which sth can be evaluated
- tropicalised — to make tropical, as in character or appearance.
- tropicalized — to make tropical, as in character or appearance.
- underpassion — an underlying or subconscious passion
- unpatronized — having few or no patrons
- unpavilioned — not provided with a pavilion
- unproclaimed — to announce or declare in an official or formal manner: to proclaim war.
- unsaponified — to convert (a fat) into soap by treating with an alkali.
- velocipedean — someone who rides a velocipede
- video piracy — the unauthorized or prohibited use of audio-visual works covered by copyright law, in a way that violates one of the copyright owner's exclusive rights, such as the right to reproduce the copyrighted work, or to make derivative works
- video player — VCR: videotape recorder
- videographer — a person who makes films with a video camera.
- widow's peak — a point formed in the hairline in the middle of the forehead.