It's different-- Elmers (and most "white glues") are made from whey-- a waste product of cheese making--
Milk is seperated into "curds and whey" and the curds become cheese. Whey (in the quanties that were being prduced) was a "toxic waste" it killed fish, it smelled bad, ect.. But someone noticed, it dried "sticky" and it glued paper to a surface--

So Elsie survives "white glue" now as for a mucilage type glues...