What's the difference between suffix and suffixion?

Suffix

Definition:

(n.) A letter, letters, syllable, or syllables added or appended to the end of a word or a root to modify the meaning; a postfix.
(n.) A subscript mark, number, or letter. See Subscript, a.
(v. t.) To add or annex to the end, as a letter or syllable to a word; to append.

Example Sentences:

(1) The home of the newspaper's content has been theguardian.com, which is the only non-"dot com" domain suffix in the top 10 Google News list of digital news outlets.
(2) Non-speech sounds, on the other hand, produce no suffix effect even when the subjects are forced to process them.
(3) The functioning genes contain short insertions carrying polyadenylation signals and polyadenylation sites at the same position of the suffix.
(4) Picture and graphic suffixes led to small, reliable end-of-sequence suffix effects, but spoken suffixes did not.
(5) Two experiments were conducted to investigate the nature of the delayed-suffix effect reported by Watkins and Todres (1980).
(6) The results yielded a significant reduction in the recall of the terminal words of the definitions in the speech suffix conditions compared with the tone control.
(7) In two other experiments involving auditory and visual presentation, respectively, subjects who had never been given paired associate training were required to recall the English words that had previously been associated with the ASL and QV stimuli, in a standard suffix paradigm.
(8) 2) There was a normal suffix effect or attenuation of the recency effect when the digits were followed by an another irrelevant speech suffix, the "8".
(9) The grammatical forms assessed were verb-subject agreement third person singular, negative concord, possessive suffix, and continuative be.
(10) Errors of the auxiliary and suffix were easier for children to identify than an adverbial error which required a sentence analysis to determine the incompatibility.
(11) The company choose the event to announce, not one, but two new consoles: an updated version of the Xbox One with a simple “S” suffix, and a more powerful upgrade – codenamed Project Scorpio – due out next year.
(12) Thus, in noise suffix mode, probability of recall was increased at the last one or two digits as similarly with in no suffix mode.
(13) The semantic and syntactic implications of the suffix are never evaluated.
(14) These recency effects are greatly reduced when an irrelevant auditory stimulus (a stimulus suffix) is presented.
(15) Whatever crumbs of wrongdoing there may be, they don’t amount to something worthy of Watergate, or even the myriad gate-suffixed scandals since.
(16) The primary effect, the recency effect and the suffix effect are already regarded as the characteristic items of acoustic memory produced in subjects with normal hearing ability.
(17) The suffixes phys and abol, respectively, mean the physiological and solely Vm-abolished conditions.
(18) The nucleotide sequences of 8 genomic and 2 mRNA copies of the suffix were studied.
(19) Serial recall of lip-read, auditory, and audiovisual memory lists with and without a verbal suffix was examined.
(20) Advanced disorders are designated by a composed term classifying them among the groups of primary disease and specifying the advanced stage by a suffix, so that the underlying disease remains coining the term, even in unclassifiable cases in which only CMPDs can be applied.