A conversation, one minute ago:
JP: What do you call 'more than one uterus'? Do you say, 'one uterus, two
uteri'?
Steve: No, I
don't say
uteri! It's
uteruses.
Chantal: You don't say
uteruses.
Steve: Sure! It's like
universes.
Apparently, it's either, but I only found out later.