sobolen.
Etymology: Anglicized form of soboles n.
rare. Apparently only attested in dictionaries or glossaries.
the world > plants > part of plant > stem or stalk > [noun] > underground
1866 J. Lindley & T. Moore II. 1068/1.
This entry has not yet been fully updated (first published 1913; most recently modified version published online March 2022).