linear and nonlinear linear approach linear approximation linear arrangement linear array linear axes linear axis linear ball linear bearing linear bearings linear block linear chain linear chains linear change linear collider linear combination linear combinations linear compressor linear control linear correlation linear density linear dependence linear design linear differential equations linear dimensions linear direction linear discriminant linear displacement linear distance linear drive linear economy linear elastic linear electric linear element linear elements linear encoder linear epitope linear epitopes linear equation linear equations linear ethylene linear expansion linear fashion linear fatty linear features linear feedback shift linear feet linear filtering linear fit linear flow linear fluorescent linear form linear function linear functional linear functions linear gradient linear group linear growth linear guide linear guides linear high linear hydraulic linear increase linear independence linear induction linear inequalities linear interpolation linear light linear lighting linear load linear logic linear low linear low density linear low density polyethylene linear manner linear map linear matrix linear measurement linear meter linear meters linear metres linear mixed linear mode linear model linear models linear momentum linear motion linear motor linear motors linear movement linear narrative linear operator linear operators linear or branched linear or branched alkyl linear or branched alkyl group linear or circular linear or cyclic linear or non-linear