Re: [dinosaur] An etymological question

["David Marjanovic" <david.marjanovic@gmx.at>]

> Greek teuthis, genitive teuthidos (stem teuthid-)

In other words, teuthis is teuthid-s; the -is would theoretically be -its, but 
Ancient Greek did not consider ts pronounceable (in stark contrast to ks and 
ps); all its expected occurrences surface as just s. (Modern Greek is full of 
ts, though still not at the ends of words.)

This also explains ornis, genitive ornithos: ornis is the automatic outcome of 
ornith-s.

The same holds for Latin, BTW.