词根词缀：chordo-, chord-, cordo-, cord-

【来源及含义】Greek: khorde, "gut string" [of a lyre]; used in an extended sense to mean "sinew, flexible rod-shaped organ, string, cord"; Latin: chorda, "related notes in music, string of a musical instrument, cat-gut" via Old French, corde, "rope, string, twist, cord"

【同源单词】anemochord, cephalochordata, chordata, chordectomy, chorditis, chronic subglottic laryngitis

词根词缀：octa-, octo-, oct-, octi-, octon-

【来源及含义】Greek > Latin: eight, eighth

【同源单词】octachord, octad, octagon, octagonal, octagynous, octahedral