Seidlitz powders vs Seidlitz powder

Seidlitz powders and Seidlitz powder both are nouns.

Word	Noun	Adjective	Verb	Adverb
Seidlitz powders	Yes	No	No	No
Seidlitz powder	Yes	No	No	No

As nouns, Seidlitz powders and Seidlitz powder are synonyms defined as:

Seidlitz powders and Seidlitz powder: an effervescing salt containing sodium bicarbonate and Rochelle salt and tartaric acid; used as a cathartic

Other synonyms of Seidlitz powders include Rochelle powder.

Seidlitz powders (noun)	Seidlitz powder (noun)
an effervescing salt containing sodium bicarbonate and Rochelle salt and tartaric acid; used as a cathartic	an effervescing salt containing sodium bicarbonate and Rochelle salt and tartaric acid; used as a cathartic