            
              you are absolutely correct. The correct Terms are siphonicä- and washdown-toilets. My mistake.
if there are "american Continents" and they can be referred to as "the Americas" then i would deduct that all the objects within those Continents are also "American"

[–] [email protected] 2 points 1 year ago

they can be referred to as "the Americas" then i would deduct that all the objects within those Continents are also "American"

Unfortunately not though, because "American" is already used exclusively in reference to the USA. There is no adjective to refer to things from the Americas collectively. One of these two possible uses is extremely common and the other is extraordinarily rare. If you need the rare option, you need multiple words and can't shorten it.