| 单词 |
prechordal |
| 释义 |
prechordal, præ-, a.|priːˈkɔːdəl| [f. pre- B. 1, 3 + chord + -al1: see chordal.] 1. Biol. Prior to the development of a notochord in animals, or to the evolution of the Chordata.
1888Encycl. Brit. XXIV. 187/2 No other Vertebrata present larval forms which indicate the nature of the early ancestral history in what we may call præ-chordal times. 2. Anat. See quot.
1890Billings Med. Dict., Præchordal, in front of the anterior end of the notochord. |

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