aræometer, areo-
(ɛəriːˈɒmɪtə(r))
[mod. f. Gr. ἀραιός thin + µέτρον measure: see -meter. App. through F. aréomètre: whence the prevalent spelling, as if from area, or areo-, of Mars.]
An instrument, consisting of a graduated glass tube terminating in a loaded bulb, for measuring the specific gravity of fluids; a hydrometer. Hence: aræometric (əˌriːəʊˈmɛtrɪk), a. [see -ic], of or pertaining to aræometry. aræoˈmetrical a. = prec. aræometry (ɛəriːˈɒmɪtrɪ). [Gr. -µετρία measurement], the art or science of estimating the specific gravity of fluids by means of an aræometer.
| 1706 Phillips, Areometer. 1730 Desaguliers in Phil. Trans. XXXVI. 277 The Hydrometer, by some called Areometer. 1731 Bailey, Aræometer. 1751 Chambers Cycl., The Aræometer or waterpoise is usually made of glass. 1876 Ure Dict. Arts I. 207 The areometer of Baumé is used in France. 1871 B. Stewart Heat §54 The areometric method, or that of weighing a solid in the liquid. 1847 Craig, Areometrical. 1778 Phil. Trans. LXVIII. 419 An Essay on Pyrometry and Areometry. 1819 Rees' Cycl. II. s.v. Aremometer, Invented by Wolfius in 1708, and first published in his ‘Areometry.’ |