lumbarization

The English word “lumbarization” has 1 meaning listed here.

noun

A spinal anomaly in which the first and second segments of the sacrum do not fuse, and consequently the lumbar spine appears to have six vertebrae or segments, not five, while the sacrum appears to have only four.

From lumbar + -ization.

Keep exploring: in the interactive dictionary every word of a definition is a link. Open “lumbarization” there

The English dictionary on Glottosphere has 650,529 entries with a page. Browse the English dictionary.

Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.