The Collaborative International Dictionary
Sesquibasic
Sesquibasic \Ses`qui*ba"sic\, a. [Sesqui- + basic.] (Chem.) Containing, or acting as, a base in the proportions of a sesqui compound.
Wiktionary
sesquibasic
a. (context chemistry English) Containing, or acting as, a base in the proportions of a sesqui compound.