achordate

Referring to animal forms below the Chordata that do not develop a notochord or chorda. ... (05 Mar 2000) ...
Found on http://www.encyclo.co.uk/local/20973

achordate

Type: Term Pronunciation: ā-kōr′dāt, ā-kōr′dăl Definitions: 1. Referring to animal forms below the level of Chordata that do not develop a notochord or chorda.
Found on http://www.medilexicon.com/medicaldictionary.php?t=626
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