Definition of ganglionless in US English:

ganglionless

adjective

Anatomy Zoology
rare
  • Lacking a nerve ganglion or ganglia; = aganglionic.

Origin

Early 19th century; earliest use found in The London Medical Gazette. From ganglion + -less.

Pronunciation

ganglionless

/ˈɡaŋɡlɪənləs/