16-letter words containing o, r, a, i

sidestream smoke — secondhand smoke.
signal generator — radio
simon boccanegra — an opera (1857) by Giuseppe Verdi.
simonyi, charles — Charles Simonyi
singapore strait — a strait between Singapore Island and the Riau Archipelago at the S end of the Malay Peninsula: shipping channel between the South China Sea and the Malacca Strait. 65 miles (105 km) long and 10 miles (16 km) wide.
sir isaac newton — Sir Isaac, 1642–1727, English philosopher and mathematician: formulator of the law of gravitation.
slang dictionary — a specialized dictionary covering the words, phrases, and idioms that reflect the least formal speech of a language. These terms are often metaphorical and playful, and are likely to be evanescent as the spoken language changes from one generation to another. Much slang belongs to specific groups, as the jargon of a particular class, profession, or age group. Some is vulgar. Some slang terms have staying power as slang, but others make a transition into common informal speech, and then into the standard language. An online slang dictionary, such as the Dictionary.com Slang Dictionary, provides immediate information about the meaning and history of a queried term and its appropriateness or lack of appropriateness in a range of social and professional circumstances.
slow metabolizer — A slow metabolizer is someone whose body is slow to break down, absorb, or use a particular substance.
smooth breathing — a symbol (') used in the writing of Greek to indicate that the initial vowel over which it is placed is unaspirated.
soapberry family — the plant family Sapindaceae, characterized by chiefly tropical trees, shrubs, or herbaceous vines having compound leaves, clustered flowers, and berrylike, fleshy, or capsular fruit, and including the balloon vine, golden rain tree, litchi, and soapberry.
social darwinism — a 19th-century theory, inspired by Darwinism, by which the social order is accounted as the product of natural selection of those persons best suited to existing living conditions and in accord with which a position of laissez-faire is advocated.
social democracy — a political ideology advocating a gradual transition to socialism or a modified form of socialism by and under democratic political processes.
social gathering — party, get-together
social insurance — any of various forms of insurance in which a government is an insurer, especially such insurance that provides assistance to disabled or unemployed workers and to aged persons.
social secretary — a personal secretary employed to make social appointments and handle personal correspondence.
social structure — structure (def 9).
sodium carbonate — Also called soda ash. an anhydrous, grayish-white, odorless, water-soluble powder, Na 2 CO 3 , usually obtained by the Solvay process and containing about 1 percent of impurities consisting of sulfates, chlorides, and bicarbonates of sodium: used in the manufacture of glass, ceramics, soaps, paper, petroleum products, sodium salts, as a cleanser, for bleaching, and in water treatment.
sodium perborate — a white, crystalline, water-soluble solid, NaBO 2 ⋅3H 2 O or NaBO 3 ⋅4H 2 O, used chiefly as a bleaching agent and antiseptic.
software library — a collection of programs that are used to develop software
solar prominence — prominence (def 3).
sole beneficiary — the only beneficiary
solid propellant — a rocket propellant in solid form, usually containing a mixture or combination of fuel and oxidizer.
source materials — publications from which information is obtained
south australian — a state in S Australia. 380,070 sq. mi. (984,380 sq. km). Capital: Adelaide.
south carolinian — a state in the SE United States, on the Atlantic coast. 31,055 sq. mi. (80,430 sq. km). Capital: Columbia. Abbreviation: SC (for use with zip code), S.C.
southern baptist — a member of the Southern Baptist Convention, founded in Augusta, Georgia, in 1845, that is strictly Calvinistic and active in religious publishing and education.
spanish moroccan — of or relating to the former Spanish colony of Spanish Morocco (now part of Morocco) or its inhabitants
sparking voltage — the minimum voltage required to produce a spark across a given spark gap.
speak for itself — be self-evident
spectroheliogram — a photograph of the sun made with a spectroheliograph.
spiritualization — to make spiritual.
spreading factor — a substance, as hyaluronidase, that promotes the diffusion of a material through body tissues
spring mountains — a mountain range in S Nevada extending to the California border. Highest peak, Charleston Peak. 11,919 feet (3635 meters).
spring snowflake — a European amaryllidaceous plant, Leucojum vernum, with white nodding bell-shaped flowers
square kilometer — a unit of area measurement equal to a square measuring one kilometer on each side. 2 , sq. km. Abbreviation: km.
st. clair shores — a city in SE Michigan, near Detroit.
staffing officer — someone who recruits, hires, and ensures the interests of staff and employees in an organization
stage production — a play or show which is performed on stage
stannic chloride — a colorless fuming and caustic liquid, SnCl 4 , soluble in water and alcohol, that converts with water to a crystalline solid: used for electrically conductive and electroluminescent coatings and in ceramics.
state of affairs — situation
stationary front — a front between warm and cold air masses that is moving very slowly or not at all.
stationary orbit — an orbit lying in, or approximately in, the plane of the equator for which the orbital period is equal to the spin period of the central body
stationary point — a point on a curve at which the tangent is either horizontal or vertical, such as a maximum, a minimum, or a point of inflection
stationary state — any of several energy states an atom may occupy without emitting electromagnetic radiation.
stereoregularity — (of a polymer) the degree to which successive configurations in space along the chain follow a simple rule. Also called tacticity. Compare configuration (def 4).
still photograph — a photograph taken from a cinema film which is used for publicity purposes
stock car racing — the sport of racing in stock cars
stomach-churning — causing nausea.
stonecrop family — the plant family Crassulaceae, characterized by succulent herbaceous plants and shrubs with simple, fleshy leaves, clusters of small flowers, and dry, dehiscent fruit, and including hen-and-chickens, houseleek, kalanchoe, live-forever, orpine, sedum, and stonecrop.
storage capacity — amount of room or space

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