1890 in Cent. Dict. Protonic, preceding the tone or accent.

1895 Mod. Lang. Notes 10 176/1 If the protonic vowel is in hiatus with the tonic, the preceding vowel is the true protonic.

1931 Italica 8 82 There is one other annoying habit, that results from the English tendency in pronunciation..:the slurring of unstressed vowels, and most especially of protonic A.

1969 Hispania 52 396/2 Most of these changes occur when the e is in protonic position which tends to make it rise to i.

1997 R. Posner Ling. Change in French vi. 269 Doubt is cast on the accepted story that the atonic e, whether a default epenthetic vowel or derived from atonic A or protonic E, had a..schwa realization in Old French.

1902 Trans. Amer. Microsc. Soc. 1901 23 59 The differentiation has gradually extended posteriad from the protonic inception.

1928 Proc. National Acad. Sci. U.S.A. 14 327 Nothing has been said about information on electronic or protonic structure derived from the statistical results of scattering experiments.

1953 R. B. Braithwaite Sci. Explan. 93 Hydrogen atoms behave..as if they were solar systems each with an electronic planet revolving round a protonic sun.

1961 G. R. Choppin Exper. Nucl. Chem. i. 1 The existence of nuclei means..that there must also be another force present which is strong enough to counterbalance the protonic repulsion and hold the nucleons together.

1997 Solid State Ionics, Diffusion & Reactions 97 399 The protonic conductivity..exhibited by these minerals is associated with the proton diffusional motion.

1933 Jrnl. Amer. Chem. Soc. 55 3538 The salts may be looked upon as derivatives of extremely weak acids..and they, therefore, react readily with most protonic solvents.

1966 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. II. xxxiii. 563 Organometallic compounds undergo typical reactions with compounds which contain protonic hydrogen, i.e. which act as acids towards them... Of these reactions, hydrolysis is one of the most important.

1969 T. C. Waddington Non-aqueous Solvents i. 8 In terms of Brønsted-Lowry or protonic acids, the strongest acid in a solvent is the protonated form of that solvent and the strongest base the deprotonated form.

1991 Progress Polymer Sci. 16 144 Upon irradiation by light, these onium salts generate in situ a strong protonic acid (HX; the proton from a solvent, etc.) that initiates cationic polymerization.

1970 Jrnl. Physical Chem. 74 2199/1 This..suggests that each [atom] behaved as a discrete protonically acidic species.

1999 Proc. National Acad. Sci. U.S.A. 96 35/2 This domain, which appears well connected protonically to the outside of the membrane.