Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. In front of the notochord

from The Century Dictionary and Cyclopedia

  • Situated in front of the notochord: applied to those parts of the brain which are anterior to the end of the chorda dorsalis: correlated with epichordal and parachordal.
  • Prior in time to the existence of the Chordata or chor-date animals; before the evolution of a notochord in animals.

Etymologies

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Examples

  • Recent observations have shown that, in mammals, the basi-cranial cartilage, both in the chordal and prechordal regions of the base of the skull, is developed as a single plate which extends from behind forward.

    II. Osteology. 1. Development of the Skeleton

  • In the lower vertebrates two pairs of cartilages are developed, viz., a pair of parachordal cartilages, one on either side of the notochord; and a pair of prechordal cartilages, the trabecul√¶ cranii, in front of the notochord (Fig. 66).

    II. Osteology. 1. Development of the Skeleton

  • The base of the skull may therefore be divided into (a) a chordal or vertebral, and (b) a prechordal or prevertebral portion.

    II. Osteology. 1. Development of the Skeleton

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