13-letter words containing d, a, l, r
- tread lightly — to proceed with delicacy or tact
- triple-header — a set of three games, as of basketball, each game being played in the same arena on the same day and often between different pairs of teams.
- turbine blade — any of a number of bladelike vanes assembled around the periphery of a turbine rotor to guide the steam or gas flow
- twelfth grade — (in the US) the final year of secondary school after which students usually graduate at age 17 or 18
- tyndallimetry — the determination of the concentration of suspended material in a liquid by measuring the amount of light scattered
- ultra-radical — of or going to the root or origin; fundamental: a radical difference.
- ultraorthodox — extremely or excessively orthodox, esp with regards to religion
- ultrararefied — extremely rarefied
- ultrawideband — a transmission technique using a very wide spectrum of frequencies that enables high-speed transfer of data
- umbrella bird — any of several large trogons of the genus Cephalopterus, of Central and South America, as C. ornatus, having an umbrellalike crest above the head.
- unaccelerated — to cause faster or greater activity, development, progress, advancement, etc., in: to accelerate economic growth.
- unadulterated — not diluted or made impure by adulterating; pure: unadulterated maple syrup.
- unarticulated — not articulated
- uncentralized — to draw to or gather about a center.
- unchlorinated — not chlorinated; not treated with chlorine
- undeliverable — capable of delivery.
- under a cloud — a visible collection of particles of water or ice suspended in the air, usually at an elevation above the earth's surface.
- under a spell — in a trance
- under-planned — a scheme or method of acting, doing, proceeding, making, etc., developed in advance: battle plans.
- underclassman — a freshman or sophomore in a secondary school or college.
- underinflated — lacking sufficient air pressure
- undermodulate — to reproduce (a sound or signal) at below the optimal output level in a recording or broadcasting system, causing it to be distorted.
- understatedly — in an understated manner
- undescribable — to tell or depict in written or spoken words; give an account of: He described the accident very carefully.
- undirectional — of, relating to, or indicating direction in space.
- undiscernable — capable of being discerned; distinguishable.
- unillustrated — not containing illustrations
- unlearnedness — the quality or condition of being unlearned
- unobliterated — to blot out or render undecipherable (writing, marks, etc.); efface.
- unparallelled — not paralleled; unequaled or unmatched; peerless; unprecedented: unparalleled athletic ability.
- unpersuadable — not open or susceptible to persuasion
- unplagiarized — to take and use by plagiarism.
- unpredictable — not predictable; not to be foreseen or foretold: an unpredictable occurrence.
- unpredictably — not predictable; not to be foreseen or foretold: an unpredictable occurrence.
- unsecularized — to make secular; separate from religious or spiritual connection or influences; make worldly or unspiritual; imbue with secularism.
- untraditional — of or relating to tradition.
- unwarrantedly — in an unwarranted manner
- upgradability — an incline going up in the direction of movement.
- upland plover — a large, field-inhabiting sandpiper, Bartramia longicauda, of eastern North America, resembling a plover: now protected and increasing in numbers.
- urban dweller — a person who lives in an urban area
- uridylic acid — nucleotide consisting of uracil, ribose, and a phosphate group. It is a constituent of RNA
- valedictorian — a student, usually the one ranking highest academically in a school graduating class, who delivers the valedictory at the commencement exercises.
- valproic acid — a carboxylic acid, C 8 H 16 O 2 , used for its antiepileptic properties in the treatment of various seizures including petit mal.
- van der waals — Johannes Diderik (joːˈhɑnəs ˈdiːdərik). 1837–1923, Dutch physicist, noted for his research on the equations of state of gases and liquids: Nobel prize for physics in 1910
- verticillated — whorled
- victoria land — a region in Antarctica, bordering on the Ross Sea, mainly in Ross Dependency.
- victory medal — a round bronze medal awarded to all those who served in the armed forces of the U.S. during World War I.
- video library — video and dvd lending service
- vindicatorily — in a vindicatory manner
- viola d'amore — a treble viol with numerous sympathetic strings and several gut strings, producing a resonant sound.