nodus

[noh-duh s] /ˈnoʊ dəs/
noun, plural nodi
[noh-dahy, -dee] /ˈnoʊ daɪ, -di/ (Show IPA)
1.
a difficult or intricate point, situation, plot, etc.
Origin
1350-1400; Middle English: knot in the flesh < Latin nōdus knot
British Dictionary definitions for nodus

nodus

/ˈnəʊdəs/
noun (pl) -di (-daɪ)
1.
a problematic idea, situation, etc
2.
another word for node
Word Origin
C14: from Latin: knot
nodus in Medicine

nodus no·dus (nō'dəs)
n. pl. no·di (-dī)
A circumscribed mass of tissue; a node.