Notochord

[nәutәkɒ:d]

解释:

(noun.) a flexible rodlike structure that forms the supporting axis of the body in the lowest chordates and lowest vertebrates and in embryos of higher vertebrates.

编辑:沃伦--From WordNet

解释:

(n.) An elastic cartilagelike rod which is developed beneath the medullary groove in the vertebrate embryo, and constitutes the primitive axial skeleton around which the centra of the vertebrae and the posterior part of the base of the skull are developed; the chorda dorsalis. See Illust. of Ectoderm.

录入:卡利

解释:

n. a simple cellular rod the basis of the future spinal column persisting throughout life in many lower vertebrates as the amphioxus &c.—adj. Nō′tochordal.

坎迪编辑