excalation

[ĕk′skə-lāshən]

n.

The absence, suppression, or failure to develop one member of a series, such as a finger or vertebra.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Examples from the Web for excalation

Historical Examples of excalation