prochordaladj.

Brit.

/prəʊˈkɔːdl/, U.S.

/proʊˈkɔrd(ə)l/

Origin: Formed within English, by derivation. Etymons: pro- prefix², chord n.¹, -al suffix¹.

Etymology: < pro- prefix² + chord n.¹ + -al suffix¹. Compare chordal adj.

Embryology.

Situated in front of the anterior end of the notochord; = prechordal adj. 1.

ΚΠ

1878 Philos. Trans. 1877 (Royal Soc.) 167 585 In the Axolotl almost half each trabecula is parachordal, and the prochordal part does not reach to the nasal sacs.

1881 Academy 23 Apr. 303 The prochordal part of the trabeculae is segmented off from the parachordal part.

1943 Q. Rev. Biol. 18 384/2 A presomite human embryo with chorda canal and prochordal plate is described.

2004 Amer. Jrnl. Ophthalmol. 137 121 It is thought that extrinsic eye muscles are derived from mesenchymal cells near the prochordal plate.

This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022).

单词	prochordal
释义	prochordaladj. Brit. /prəʊˈkɔːdl/, U.S. /proʊˈkɔrd(ə)l/ Origin: Formed within English, by derivation. Etymons: pro- prefix², chord n.¹, -al suffix¹. Etymology: < pro- prefix² + chord n.¹ + -al suffix¹. Compare chordal adj. Embryology. Situated in front of the anterior end of the notochord; = prechordal adj. 1. ΚΠ 1878 Philos. Trans. 1877 (Royal Soc.) 167 585 In the Axolotl almost half each trabecula is parachordal, and the prochordal part does not reach to the nasal sacs. 1881 Academy 23 Apr. 303 The prochordal part of the trabeculae is segmented off from the parachordal part. 1943 Q. Rev. Biol. 18 384/2 A presomite human embryo with chorda canal and prochordal plate is described. 2004 Amer. Jrnl. Ophthalmol. 137 121 It is thought that extrinsic eye muscles are derived from mesenchymal cells near the prochordal plate. This entry has been updated (OED Third Edition, June 2007; most recently modified version published online March 2022). < adj.1878
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