The Collaborative International Dictionary
Undecylic
Undecylic \Un`de*cyl"ic\, a. (Chem.) Related to, derived from, or containing, undecyl; specifically, designating that member of the fatty acids which corresponds to undecane, and is obtained as a white crystalline substance, C11H22O2.
Wiktionary
undecylic
a. (context chemistry English) Related to, derived from, or containing undecyl.