15-letter words containing d, u, p, l
- simple pendulum — a hypothetical apparatus consisting of a point mass suspended from a weightless, frictionless thread whose length is constant, the motion of the body about the string being periodic and, if the angle of deviation from the original equilibrium position is small, representing simple harmonic motion (distinguished from physical pendulum).
- snubfin dolphin — Australian dolphin with a small dorsal fin
- 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
- 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 student — a student who is not seeking a degree but enrols in a course, esp to gain academic credits
- sully-prudhomme — René François Armand [ruh-ney frahn-swa ar-mahn] /rəˈneɪ frɑ̃ˈswa arˈmɑ̃/ (Show IPA), 1839–1907, French poet: Nobel prize 1901.
- sulphur dioxide — a colourless soluble pungent gas produced by burning sulphur. It is both an oxidizing and a reducing agent and is used in the manufacture of sulphuric acid, the preservation of a wide range of foodstuffs (E220), bleaching, and disinfecting. Formula: SO2
- sulphurous acid — an unstable acid produced when sulphur dioxide dissolves in water: used as a preservative for food and a bleaching agent. Formula: H2SO3
- superabundantly — very or too abundantly
- superindividual — greater than the individual
- talcum (powder) — a powder for the body and face made of powdered, purified talc, usually perfumed
- 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.
- u-shaped valley — a steep-sided valley caused by glacial erosion
- udmurt republic — a constituent republic of W central Russia, in the basin of the middle Kama. Capital: Izhevsk. Pop: 1 570 500 (2002). Area: 42 100 sq km (16 250 sq miles)
- un-supplemented — something added to complete a thing, supply a deficiency, or reinforce or extend a whole.
- una corda pedal — soft pedal (def 1).
- unanticipatedly — in an unanticipated or unexpected manner
- undercapitalize — to provide an insufficient amount of capital for (a business enterprise).
- underemployment — employed at a job that does not fully use one's skills or abilities.
- underpopulation — having a population lower than is normal or desirable.
- underprivileged — denied the enjoyment of the normal privileges or rights of a society because of low economic and social status.
- underpublicized — lacking publicity
- undisciplinable — unable to be disciplined or controlled
- uninterruptedly — in a manner that is not broken, discontinued, or hindered
- unleaded petrol — petrol containing a reduced amount of tetraethyl lead
- unpolished rice — a partly refined rice, hulled and deprived of its germ but retaining some bran.
- unprecedentedly — without previous instance; never before known or experienced; unexampled or unparalleled: an unprecedented event.
- upward mobility — movement from one social level to a higher one (upward mobility) or a lower one (downward mobility) as by changing jobs or marrying.
- upwardly mobile — See under vertical mobility (def 1).
- uropygial gland — a gland opening on the back at the base of the tail in most birds that secretes an oily fluid used by the bird in preening its feathers.
- vincent de paul — Saint, 1576–1660, French Roman Catholic priest noted for his work to aid the poor.