15-letter words containing a, d, p, t
- serpentine jade — a green variety of serpentine used as a gem: not a true jade.
- sheffield plate — sheet copper with a cladding of silver.
- side impact bar — A side impact bar is a long beam in a car door that is designed to protect passengers during a crash.
- simplicidentate — belonging or pertaining to the Simplicidentata, formerly regarded as a suborder or division of rodents having only one pair of upper incisor teeth.
- slap and tickle — sexual play
- sodium sulphate — a solid white substance that occurs naturally as thenardite and is usually used as the white anhydrous compound (salt cake) or the white crystalline decahydrate (Glauber's salt) in making glass, detergents, and pulp. Formula: Na2SO4
- sophisticatedly — (of a person, ideas, tastes, manners, etc.) altered by education, experience, etc., so as to be worldly-wise; not naive: a sophisticated young socialite; the sophisticated eye of an experienced journalist.
- sostenuto pedal — a pedal on a grand piano that raises the dampers, allowing the tone to be sustained for those strings struck at the time the pedal is depressed.
- special edition — newspaper, magazine: extra issue
- special student — a student who is not seeking a degree but enrols in a course, esp to gain academic credits
- speed indicator — an instrument for counting the number of revolutions of a gasoline engine.
- sphaerosiderite — a type of siderite
- spheroidization — the conversion of grains into spheroids
- spit and polish — great care in maintaining smart appearance and crisp efficiency: The commander was concerned more with spit and polish than with the company's morale.
- spotted cowbane — a North American water hemlock, Cicuta maculata, of the parsley family, having a purple-mottled stem, white flowers, and deadly poisonous, tuberlike roots.
- spratly islands — a widely-scattered group of uninhabited islets and reefs in the S South China Sea, the subject of territorial claims wholly or in part by six neighbouring nations
- spread the word — make others aware
- stamping ground — a habitual or favorite haunt.
- stand-up comedy — telling jokes to an audience
- steamed pudding — a traditional pudding containing fat, sugar, eggs, flour, and other ingredients, which is steamed
- step-and-repeat — noting or pertaining to a process by which successive photo-offset plates are produced automatically or semiautomatically with great precision: used especially in making plates for multicolor printing.
- strike pay dirt — to achieve one's objective
- studio portrait — a photograph of a person taken in a studio
- suicide attempt — bid to kill oneself
- superabundantly — very or too abundantly
- superordination — Logic. the relation between a universal proposition and a particular proposition of the same quality containing the same terms in the same order.
- sweep the board — (in gambling) to win all the cards or money
- take down a peg — to lower the pride or conceit of; humble or dispirit
- take the pledge — a solemn promise or agreement to do or refrain from doing something: a pledge of aid; a pledge not to wage war.
- talcum (powder) — a powder for the body and face made of powdered, purified talc, usually perfumed
- tandem-compound — (of a compound engine or turbine) having high-pressure and low-pressure units in tandem.
- tax expenditure — any reduction in government revenue through preferential tax treatment, as deductions or credits.
- the disappeared — people who have been arrested secretly or abuducted and presumably imprisoned or killed
- the handicapped — those who are physically disabled or mentally retarded
- the perigordian — the Perigordian culture
- the present day — The present day is the period of history that we are in now.
- to sow gapeseed — to stare in a gaping manner instead of attending to business
- top dead center — Top dead center is the position of an engine's piston when it is at the very top of its stroke.
- top dead-centre — the position of the crank of a reciprocating engine or pump when the piston is at the top of its stroke
- total depravity — the Calvinist doctrine that humankind's entire nature, including its reason, is corrupt or sinful as a result of the Fall and that people are therefore completely dependent on God for regeneration.
- trade paperback — a paperback book of a size similar to a typical hard-cover book, intended for sale in bookstores as distinguished from a cheaper and smaller paperback intended for sale on racks at drugstores, newsstands, etc.
- trading capital — the total amount of money available for buying assets
- trading company — a company that is owned by the people who have bought shares in that company
- trading partner — a person, organization, or country with whom somebody customarily does business
- trading profits — profits made from the buying and selling of goods and services
- transportedness — the quality or state of being carried away with pleasure or rapture
- trapdoor spider — any of various, often large, spiders (esp. family Ctenizidae) that dig a burrow and cover the entrance with a hinged lid like a trapdoor
- treacle pudding — a sponge cake with syrup on top
- tricuspid valve — the valve, consisting of three triangular flaps of tissue between the right auricle and ventricle of the heart, that keeps blood from flowing back into the auricle.
- type 1 diabetes — diabetes (def 3).