repr. Gr. τονο-, combining form of τόνος stretching, tension, TONE, combining element in many technical words. Tonogram [-GRAM], the record of a tonograph. Tonograph -GRAPH], a recording tonometer; see also quot. 1890; so Tonographic a., Tonography. Tonomitter [L. mittĕre to send]: see quot. Tonophant [Gr. -φάντης one who shows], a device whereby acoustic vibrations are rendered visible. Tonoplast, Bot. [-PLAST]: see quots. Tonotactic a., of or pertaining to tonotaxis. Tonotaxis [TAXIS]: see quot.: also called osmotaxis.
1899. Syd. Soc. Lex., *Tonogram.
1911. Webster, Tonogram, a curve showing graphically a muscle’s isometric contraction.
1890. Pall Mall G., 21 March, 5/2. Some specimens of a new photographic process, called *‘Tonographs,’ were exhibited by Messrs. Mayall.
1899. Syd. Soc. Lex., Tonograph, a machine for recording the tension of the arterial blood-current.
1867. Macfarren, Harmony, i. 31. The vibrations of the air inducing musical sounds, by a process which might be called *tonography, imprint their [etc.].
1899. Syd. Soc. Lex., *Tonomitter, an instrument to improve the hearing near the opening of the Eustachian tube.
1895. Funk’s Standard Dict., *Tonophant, a device in which two thin pieces of steel welded together are used to exhibit acoustic vibrations to the eye. Ibid. (1895), *Tonoplast.
1903. Porter, trans. Strasburger’s Text-bk., 57. Since the vacuole wall regulates the pressure exerted by the cell sap contained in the vacuole, Hugo de Vries has applied the name Tonoplast to this layer.
1909. Cent. Dict., Supp., *Tonotactic.
1900. B. D. Jackson, Gloss. Bot. Terms, *Tonotaxis,… sensitiveness to osmotic variation.
