rheometer
(riːˈɒmɪtə(r))
[f. rheo- + -meter.]
1. Electr. An instrument for measuring the force of an electric current.
| 1839 Ann. Electr., Magn. & Chem. IV. 70 On this plan my Reometer (an instrument described in Gehler's Phil. Dictionary, new edition, vol. vi, sec. 3, p. 2494) is constructed and brought into action. 1843 Wheatstone in Phil. Trans. 307. 1852 Lardner Handbk. Nat. Phil. ii. 384 In certain researches a differential reometer is found useful. 1884 Sprague Electr. (ed. 2) 636 Rheometer.—A galvanometer. |
2. a. An instrument for measuring the force or velocity of (a) a water-current, (b) the blood-flow.
| 1877 M. Foster Text-bk. Physiol. Index, Rheometer of Ludwig, for measuring blood pressure. 1882 Nature 26 Jan. 290/2 A rheometer, for measuring currents at different depths in water. |
b. Any instrument for measuring the rheological properties of matter, esp. one which measures the viscous stress of a fluid.
| 1945 Jrnl. Appl. Physics XVI. 338 A modified Bingham-type rheometer. 1950 Jrnl. Sci. Instruments XXVII. 209 (heading) A continuous-shear rheometer for measuring total stress in rubber-like materials. 1967 Condon & Odishaw Handbk. Physics (ed. 2) iii. iii. 48/1 Rheological properties are determined quantitatively in rheometers (plastometers), for which the viscometers are the prototype, either with their absolute value or relatively to the magnitude of the same property in a standard material. 1971 Nature 5 Nov. 50/1 The slime was diluted to various concentrations with clean water from the natural environment and then tested in a portable rheometer. |
Hence rheoˈmetric a., pertaining to a rheometer or rheometry; rheˈometry, the measurement of electric currents, as by a rheometer.
| 1843 C. Wheatstone in Phil. Trans. R. Soc. CXXXIII. 309 The voltaic element which I have employed in most of my rheometric researches. 1850 A. Secchi (title), Researches on Electrical Rheometry. 1852 Lardner Handbk. Nat. Phil. ii. 383 Such an apparatus would be reoscopic, but not reometric. 1967 Condon & Odishaw Handbk. Physics (ed. 2) iii. iii. 48/1 (heading) Rheometry. 1972 Physics Bull. Feb. 85/1 It has developed a rheometric device for measuring the reaction between oil, water and detergent, based on the rheometer at the School of Pharmacy at London University. 1974 Nature 22 Mar. 328/1 In order to characterize the rheological behaviour of the aqueous sugar solution, an extensive series of tests was done with a rheometric mechanical spectrometer and with a Weissenberg Rheogoniometer. |