glycer-
combining form 
or glycero-
Etymology: International Scientific Vocabulary, from glycerin 
1. : glycerol 
< glyceryl >
: related to glycerol or glyceric acid
< glycerophosphoric acid >
< glyceraldehyde >
2. glycero-, usually italic : having the stereochemical arrangement of atoms or groups found in glyceraldehyde 
< 2-(d-glycero-1-hydroxyethyl)-benzimidazole >
or glycero-
1.
< glyceryl >
: related to glycerol or glyceric acid
< glycerophosphoric acid >
< glyceraldehyde >
2. glycero-, usually italic
< 2-(d-glycero-1-hydroxyethyl)-benzimidazole >