A hybrid or redundant form possibly combining elements of 'ganglion' and 'ganglia,' used in historical medical texts.
This appears to be either a scribal error, a regional variant, or a historically attested but now obsolete form mixing Latin and Greek plural conventions. Its precise etymology is uncertain.
This word is a beautiful fossil in medical English—it shows how scribes and doctors experimented with Latin and Greek plurals before the language standardized on 'ganglia' as the correct plural form.
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