Find the word definition

Wiktionary
guar gum

n. a heteropolysaccharide gum, extracted from the guar bean, that is used as a food additive

WordNet
guar gum

n. from seeds of the guar plant; used to thicken foods and as sizing for paper and cloth

Wikipedia
Guar gum

Guar gum, also called guaran, is a galactomannan. It is primarily the ground endosperm of guar beans. The guar seeds are dehusked, milled and screened to obtain the guar gum. It is typically produced as a free-flowing, off-white powder.