chord-
combining form 
or chordo-
Etymology: New Latin, from Greek, from chordē gut, string — more at yarn 
 : an anatomical cord: as 
a. : vocal cord 
< chorditis >
b. : spinal cord 
< chordotomy >
c. : notochord 
< Chordata >
or chordo-
a.
< chorditis >
b.
< chordotomy >
c.
< Chordata >