dipolar ions

(redirected from amphions)
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di·po·lar i·ons

ions possessing both a negative charge and a positive charge, each localized at a different point in the molecule, which thus has both positive and negative "poles"; amino acids are the most notable dipolar ions, containing a positively charged NH3+ group and a negatively charged COO- group at neutral pH.
Synonym(s): amphions, zwitterions

di·po·lar ions

(dī-pō'lăr ī'onz)
Ions possessing both a negative charge and a positive charge, each localized at a different point in the molecule, which thus has both positive and negative "poles."
Synonym(s): zwitterions.
References in classic literature ?
MESSENGER Attend all ye who dwell beside the halls Of Cadmus and Amphion. No man's life As of one tenor would I praise or blame, For Fortune with a constant ebb and rise Casts down and raises high and low alike, And none can read a mortal's horoscope.
The chosen men of the Athenians were in the van, led by Menestheus son of Peteos, with whom were also Pheidas, Stichius, and stalwart Bias; Meges son of Phyleus, Amphion, and Dracius commanded the Epeans, while Medon and staunch Podarces led the men of Phthia.
This interest in the subjective look explains why so many objects in the gallery are themselves furnished with eyes: from the figurative yellow eyes" ([TEXT NOT REPRODUCIBLE IN ASCII], 1.10.2) which adorn the image of Amphions lyre, to the pirate ship of 1.19.3, which "seems to see through the grim eyes on its prow" ([TEXT NOT REPRODUCIBLE IN ASCII]); indeed, even the gallery itself is described as actively looking (as opposed to something to be passively looked at), "gazing out over the Tyrrhenian sea" ([TEXT NOT REPRODUCIBLE IN ASCII], praef.4).