DECYL Meaning of DECYL in English /des"euhl/ , n. Chem.a group of isomeric univalent radicals, C 10 H 21 , derived from the decanes by removing one hydrogen atom. [ DEC(ANE) + -YL ] Random House Webster's Unabridged English dictionary. Полный английский словарь Вебстер - Random House . 2012