Definition of notochord in English:

notochord

noun

Zoology
  • A cartilaginous skeletal rod supporting the body in all embryonic and some adult chordate animals.

    • ‘In those chordates which lack bone, muscles work against the notochord to move the animal.’
    • ‘They all have, at some embryonic stage, a notochord, flanked by muscle, and a dorsal neural tube.’
    • ‘In the evolution of vertebrates, long bodies with continuously flexible notochords and segmental muscles existed before the appearance of segmental vertebrae.’
    • ‘Let us review the fundamental features of the vertebrate body as context for notochords and backbones.’
    • ‘Moreover, these ectopic neural tubes were patterned appropriately with respect to the notochord and dorsal ectoderm.’

Origin

Mid 19th century: from Greek nōton back + chord.

Pronunciation:

notochord

/ˈnəʊtə(ʊ)kɔːd/