Am 28.10.2018 um 09:13 schrieb Richard Wordingham via Unicode:
The notation is a quite widespread format for abbreviations. the
first letter is normal sized, and the subsequent letter is written in
some variety of superscript with a squiggle underneath so that it
doesn't get overlooked. I have deduced that this is not plain text
because there is no encoding mechanism for it. For example, our
lecturers would frequently use this treatment to abbreviate function
as 'fn' with the 'n' superscript and supported by a squiggle below
sitting on the baseline. The squiggle below has meaning; it marks the
word as an abbreviation.
Richard.
Looks to me like U+2116 № NUMERO SIGN
which perhaps should not have encoded,
since we have both U+004E LATIN CAPITAL LETTER N and
U+00BA º MASCULINE ORDINAL INDICATOR
Arn0
