As nouns the difference between anion and inion
is that anion is a negatively charged ion while inion is a small protuberance on the external surface of the back of the skull near the neck; the external occipital protuberance.
anion
Noun
(
en noun)
A negatively charged ion.
Related terms
* cation
Anagrams
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inion
Noun
(en-noun)
(anatomy) A small protuberance on the external surface of the back of the skull near the neck; the external occipital protuberance.