sidewinder /ˈsaɪd.waɪn.dɚ/noun 6verb 1forms 3 noun6 •A North American rattlesnake, Crotalus cerastes, that inhabits lowland deserts. •A rollercoaster element where riders enter a half-loop followed by a half-corkscrew, and exit perpendicular to the direction of entry. •(slang) A person who is untrustworthy and dangerous. •(informal) A pitcher who throws sidearm. •(slang, old-fashioned) A heavy swinging blow from the side which disables an adversary. •A type of middle-distance deep-sea trawler widely used during the 1960s and 1970s. verb1 •Synonym of sidewind. formssidewindered · sidewindering · sidewinders