mother liquor
Noun
Meaning
English Wikipedia has an article on:mother liquorWikipedia
mother liquor (plural mother liquors)
(chemistry) The solution remaining after a component has been removed by processes such as filtration, crystallization, etc..
Examples
In the past, crystals were loaded into glass capillaries with the crystallization solution (the mother liquor ).
These crystals grow as sugar from the mother liquor forms around them.
This sugar ("raw") is of lower quality with more colour and impurities, and is the main source of the sugar dissolved again into the mother liquor.