dactylous adjective3 •Having or pertaining to fingers or toes.Congenital dactylous malformations in 15 of 401 malformed lambs ( 3.7 percent ) are described . — 1972 •Finger-like.basal dactylous cell of the sterile branchlets tapering into the conical and strongly acuminate ultimate cell ; basal dactylous cell of the fertile branchlets rounded at the apex — 1941 •Pertaining to dactyls.