Somehow missed this earlier reply until it was replied to . . .

On 10/20/05, R A Brown <[log in to unmask]> wrote:
Mark J. Reed wrote:

> Or, my personal (least) favorite, "hexadecimal" - chosen over the more
> linguistically consistent (albeit still demonstrably artificial)
> "sexadecimal" to avoid having "sex" in the word.  *sigh*

Humph - altho we have _sexaginta_ (60), _sexagesimus_ (60th) etc, the
use of -a- as an infix between 'sex' and another morpheme is not
productive in Latin. The Latin for 16 is 'sedecim'.

But it should be noted that 'decimal' is derived from the Latin
_ordinal_ number 'decimus' (not the cardinal 'decem'); 16th was two
words 'sextus decimus'. If a word is used as a prefix the normal
connective infix in Latin is-i-, thus the purely Latin derived form
would be *sextidecimal*

My understanding was that the rejected form was indeed "sexadecimal" despite that term's dubious construction; the reasons you cite above are why I said the word was "still demonstrably artificial".  Thanks for doing the actual demonstration, though. :) 

In fact a Google for 'sextidecimal' will confirm this.

Indeed.  It seems that "sextidecimal" may have been the actual rejected form.  My apologies for spreading misinformation, if such it was.

Mark J. Reed <[log in to unmask]>