polycationn.
/ˌpɒlɪˈkatʌɪən/, U.S. /ˌpɑliˈkædˌaɪˌɑn/, /ˌpɑliˈkædˌaɪən/ Chemistry.
A positively charged polyion.
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the world > matter > chemistry > ions, ionization, or electrolysis > [noun] > ion > polyion > positively charged
polycation1948
1948 Jrnl. Polymer Sci. 3 259 Due to the high concentration of charge in the polycation, which is itself quite large, electrostatic forces can be transferred over much greater distances than in solutions of ordinary electrolytes.
1965 C. S. G. Phillips & R. J. P. Williams Inorg. Chem. I. xii. 465 The formation of polyanions is quite common among the heavier non-metals (e.g. polysulphides and selenides), although the formation of polycations from uncomplexed metals appears to be limited to Hg22+.
1992 C. A. Smith & E. J. Wood Biosynthesis vi. 129 Polyamines are polycations and appear to have functions in stabilizing biological structures which possess multiple negative charges.
This entry has been updated (OED Third Edition, September 2006; most recently modified version published online March 2022).
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n.1948- to startle back
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