factor
(ˈfæk tər)
Random House Webster's College Dictionary
to express (a mathematical quantity) as a product of two or more quantities of like kind, as 30 = 2 &multiplydot; 3 &multiplydot; 5, or x2−y2=(x+y) (x − y).
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roman numerals
(ˈroʊ məˌnaɪz)
Random House Webster's College Dictionary
the numerals in the ancient Roman system of notation, still used occasionally, as in pagination and dates on buildings. The basic symbols are I(=1), V(=5), X(=10), L(=50), C(=100), D(=500), and M(=1000). If a letter is immediately followed by one of equal or lesser value, the two values are added; if followed by one of greater value, the first is subtracted from the second; thus, XX equals 20 and IV equals 4. The year 1914 would appear as MCMXIV.
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azo
(ˈæz oʊ, ˈeɪ zoʊ)
Random House Webster's College Dictionary
pertaining to or containing the bivalent group −N=N− united to two aromatic groups.
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book value
(book value)
Princeton's WordNet
the value at which an asset is carried on a balance sheet; equals cost minus accumulated depreciation
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chromophore
(ˈkroʊ məˌfɔr, -ˌfoʊr)
Random House Webster's College Dictionary
any chemical group that produces color in a compound, as the azo group −N=N−.
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equation of time
(ɪˈkweɪ ʒə nl, -ʃə-)
Random House Webster's College Dictionary
apparent time minus mean solar time, ranging from minus 14 minutes in February to over 16 minutes in November.
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complex number
(əmˈplɛk sɪ ti)
Random House Webster's College Dictionary
a mathematical expression (a+bi) in which a and b are real numbers and i2=−1.
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chloramine
(ˈklɔr əˌmin, ˈkloʊr-, klɔˈræm in, kloʊ-)
Random House Webster's College Dictionary
any of a class of compounds obtained by replacing a hydrogen atom of an =NH or −NH
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hyperboloid
(ɪˈpɜr bəˌlɔɪd)
Random House Webster's College Dictionary
a quadric having a finite center and some of its plane sections hyperbolas. Equation: x2/a2+y2/b2−z2/c2= 1.
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cardioid
(ˈkɑr diˌɔɪd)
Random House Webster's College Dictionary
a heart-shaped curve traced by a point on a circle that rolls without slipping on another equal circle. Equation: r = a (1−cosA).
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equal
Webster Dictionary
one not inferior or superior to another; one having the same or a similar age, rank, station, office, talents, strength, or other quality or condition; an equal quantity or number; as, "If equals be taken from equals the remainders are equal."
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absolute
Webster Dictionary
in a plane, the two imaginary circular points at infinity; in space of three dimensions, the imaginary circle at infinity
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kronecker delta
(Kronecker delta)
Princeton's WordNet
a function of two variables i and j that equals 1 when i=j and equals 0 otherwise
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rankine
(ˈræŋ kɪn)
Random House Webster's College Dictionary
pertaining to an absolute temperature scale (Rankine scale) in which the degree intervals are equal to those of the Fahrenheit scale and in which 0° Rankine equals −459.7° Fahrenheit.
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phosphorylate
(ˈfɒs fər əˌleɪt, fɒsˈfɔr ə-, -ˈfɒr-)
Random House Webster's College Dictionary
to introduce the trivalent group =P=O into an organic compound.
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troy weight
(ɑ)
Random House Webster's College Dictionary
a system of weights in use for precious metals and gems, in which a pound equals 12 ounces (0.373 kg) and an ounce equals 20 pennyweights or 480 grains (31.103 grams).
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hyperbola
(ɪˈpɜr bə lə)
Random House Webster's College Dictionary
the set of points in a plane whose distances to two fixed points in the plane have a constant difference; a curve consisting of two branches, formed by the intersection of a plane with a right circular cone when the plane makes a greater angle with the base than does the generator of the cone. Equation: x2/a2−y2/b2=±1.
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disulfide
(ɪˈsʌl faɪd, -fɪd)
Random House Webster's College Dictionary
(in organic chemistry) a sulfide containing the bivalent group −SS−, as diethyl disulfide, C
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dry ice
(ˈdraɪ ər)
Random House Webster's College Dictionary
the solid form of carbon dioxide, which sublimes at −109.26°F (−78.48°C) and is used chiefly as a refrigerant.
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absolute zero
(ˌæb səˈlut li, ˈæb səˌlut-)
Random House Webster's College Dictionary
the temperature of −273.16°C (−459.69°F), the hypothetical point at which all molecular activity ceases.
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subtraction
(əbˈtræk ʃən)
Random House Webster's College Dictionary
the operation or process of finding the difference between two numbers or quantities, denoted by a minus sign (−).
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standard time
(ˈstæn dərˌdaɪz)
Random House Webster's College Dictionary
the civil time officially adopted for a country or region, usu. the civil time of some specific meridian lying within the region, with a difference of exactly one hour between one zone and the next. The standard time zones in the U.S. are Atlantic time, Eastern time, Central time, Mountain time, Pacific time, Alaska time,Hawaii-Aleutian time, and Samoa time.
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subtractive
(əbˈtræk tɪv)
Random House Webster's College Dictionary
(of a quantity) to be subtracted; having the minus sign (−).
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dalton's law of partial pressures
(Dalton's law, Dalton's law of partial pressures, law of partial pressures)
Princeton's WordNet
(chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature
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dalton's law
(Dalton's law, Dalton's law of partial pressures, law of partial pressures)
Princeton's WordNet
(chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature
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law of partial pressures
(Dalton's law, Dalton's law of partial pressures, law of partial pressures)
Princeton's WordNet
(chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature
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arithmetic progression
(əˌrɪθ mɪˈtɪʃ ən, ˌær ɪθ-)
Random House Webster's College Dictionary
a sequence in which each term is obtained by the addition of a constant number to the preceding term, as 1, 4, 7, 10, and 6, 1, −4, −9. Also called arithmetic series.
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strange quark
(ˈstreɪndʒ nɪs)
Random House Webster's College Dictionary
the quark having an electric charge −? times the electron's charge, strangeness quantum number of −1, and more mass than the up and down quarks.
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ion
(ˈaɪ ən, ˈaɪ ɒn)
Random House Webster's College Dictionary
an atom or atom group electrically charged by the loss or gain of electrons, represented by a plus or a minus sign, as a cation (Na+, Ca++) or anion (Cl−).
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differential
(ˌdɪf əˈrɛn ʃəl)
Random House Webster's College Dictionary
a function of two variables that is obtained from a given function, y = f(x), and that expresses the approximate increment in the given function as the derivative of the function times the increment in the independent variable, written as dy = f′(x)
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