undecylic

from The Century Dictionary.

• Pertaining to a compound of the methane series which contains. eleven atoms of carbon. Also called hendecoic, hendecatoic, or undecoic.

from the GNU version of the Collaborative International Dictionary of English.

• adjective (Chem.) Related to, derived from, or containing, the undecyl radical; specifically, designating that member of the fatty acids which corresponds to undecane, and is obtained as a white crystalline substance, C10H21.CO2H.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• adjective chemistry Related to, derived from, or containing undecyl.