I wasn't going to say anything but I just came across this monstrosity:

Technically, the plural is chiasmi, (as with octopus). (http://www.chiasmus.com/whatischiasmus.shtml)

and this thread is too good an opportunity to express my astonishment that anyone who wishes to pontificate to the public at large on linguistic matters could make such a mistake.

Bingley

Bingley