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Medical Definition of Excalation
1. Absence, suppression, or failure of development of one of a series of structures, as of a digit or vertebra. Origin: G. Ex, from, + chalao, to abate, release (05 Mar 2000)
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1. Absence, suppression, or failure of development of one of a series of structures, as of a digit or vertebra. Origin: G. Ex, from, + chalao, to abate, release (05 Mar 2000)