| 释义 |
reducer|rɪˈdjuːsə(r)|
[f. reduce v. + -er1.]
1. One who reduces, in various senses.
c1530Wyer C. Hyst. of Troye A b, Excuse thy reducer [= translator] blamyng his ygnoraunce. 1533Bellenden Livy ii. xv. (S.T.S.) I. 187 Þocht he was..reducear [v.r. redussar] of þame to þe ciete. a1586Sidney Arcadia (1622) 120 The reducer of them into order. 1611Speed Hist. Gt. Brit. ix. xxi. (1623) 1046 The first reducer of the University of Cambridge from rudenesse and barbarity, vnto good literature and learning. 1868G. Macdonald R. Falconer I. 243 We shall have more compilers and reducers,..and fewer inventors. 1877Raymond Statist. Mines & Mining 286 Reducers cannot now buy directly of the miner. 1923W. S. Maugham Our Betters i. 23 He's the great reducer... What does he reduce?.. The Duchess of Arlington told me he'd taken nine pounds off her.
2. That which reduces. spec.
†a. Arith. A multiplier used to reduce an amount to another denomination. Obs.
b. A reducing coupling (Knight Dict. Mech. Suppl. 1884).
c. Chem. A reducing agent (cf. also sense 2 e).
d. A reducing valve.
1674S. Jeake Arith. (1696) 152 The several Denominations are Reducers. 1894St. James's Gaz. 17 Feb. 6/2 It was a great reducer of crime. 1899Westm. Gaz. 29 June 2/1 The reducers for regulating the air-pressure in the cylinders. 1935J. N. Friend Text-bk. Physical Chem. II. vii. 302 When E0 is negative the ion in the lower state of oxidation..functions as a reducer or reductant. 1973Sci. Amer. Oct. 128/2 The oxidant, hydrogen peroxide, is stored in a plastic bag within the pressure vessel and mixed in the exit opening with reducer in the soap.
attrib.1884McLaren Spinning 128 It is necessary to have a great many reducer and roving spindles.
e. Photogr. A chemical used to reduce the density of a print or negative.
1878Abney Photogr. (1881) 298 Plain pyrogallic acid is a much less energetic reducer than alkaline pyrogallate. 1897E. J. Wall Dict. Photogr. (ed. 7) 500 Belitski's Reducer. This is the most convenient as it is one solution. Ibid. 501 If the negative has been dried, soak in water till wet, then cover with the reducer. 1905Westm. Gaz. 25 Feb. 14/2 This [sc. Farmer's] reducer is compounded of potassium ferricyanide solution, and a solution of hypo. 1911[see bleacher 4]. 1960G. A. Glaister Gloss. Bk. 342/2 Proportional reducers exert a uniform action on the negative, thus preserving the tone. 1977J. Hedgecoe Photographer's Handbk. 242 Persulfate reducer..makes a better reducer for negatives which are over-developed and therefore need less density and contrast.
f. A means of reducing one's weight.
1903E. Sandys in Athletics for Women 99 For those able to dispense with a few pounds of surplus adipose tissue, it [sc. swimming] is one of the best of reducers.
g. Printing. (See quot. 1968.)
1963Kenneison & Spilman Dict. Printing 161 Reducers, the addition of varnish, boiled oils, etc., to printing inks to enable them to work more easily. 1968Gloss. Terms Offset Lithogr. Printing (B.S.I.) 26 Reducer. 1. A liquid, miscible with ink, used to reduce its consistency. 2. A substance for addition to a printing ink to reduce its colour strength without necessarily affecting its consistency. |