The spelling of the word "plexus lumhalia" can be confusing. The pronunciation is plexəs lʌmheɪliə, with the emphasis on the first syllable of each word. The "x" in "plexus" is pronounced as a "ks" sound, and the "ch" in "lumhalia" is pronounced as a "k" sound. The word refers to a complex network of nerves or blood vessels in the body. While the spelling may be difficult, understanding the pronunciation can help convey its meaning more easily.
Lumbar p., (1) a nervous p., formed by the first four lumbar nerves; it lies in the aubstance of the psoas muscle; (2) a lymphatic p. formed of about twenty lymph nodes and connecting vessels situated along the lower portion of the aorta and the common iliac vessels.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.