oenanthylous

from The Collaborative International Dictionary of English v.0.48

oenanthylous \oe*nan"thyl*ous\, a. (Chem.)
   Of, pertaining to, or designating, an acid formerly supposed
   to be the acid of oenanthylic ether, but now known to be a
   mixture of higher acids, especially {capric} acid. [Obs.]
   [1913 Webster]