The Collaborative International Dictionary
Crossbite \Cross"bite"\, v. t. To deceive; to trick; to gull. [Obs.]
Crossbite \Cross"bite`\ (kr[o^]s"b[imac]t`), n. A deception; a cheat. [Obs.]
Wiktionary
n. 1 (context dentistry English) An occlusal irregularity where a tooth (or teeth) has a more buccal or lingual position than its corresponding antagonist tooth in the upper or lower arcade. 2 (context obsolete English) A deception; a cheat. vb. (context obsolete transitive English) To deceive; to trick.
Wikipedia
Crossbite is a form of malocclusion where a tooth (or teeth) has a more buccal or lingual position (that is, the tooth is either closer to the cheek or to the tongue) than its corresponding antagonist tooth in the upper or lower dental arch. In other words, crossbite is a lateral misalignment of the dental arches.