As nouns the difference between underbite and crossbite
is that underbite is a malocclusion, in which the lower teeth extend past the upper ones while crossbite is (dentistry) 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.
As a verb crossbite is
(obsolete|transitive) to deceive; to trick.
underbite
English
Noun
(
en noun)
A malocclusion, in which the lower teeth extend past the upper ones
See also
* overbite
crossbite
English
Noun
(
en noun)
(
wikipedia crossbite)
(dentistry) 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.
(obsolete) A deception; a cheat.
Verb
(obsolete) To deceive; to trick.