Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • adj. Not having a proto-spinal chord at any stage of development.

from The Century Dictionary and Cyclopedia

  • Having no notochord; invertebrate; belonging to the Achordata.
  • n. One of the Achordata.

Etymologies

a- +‎ chordate (Wiktionary)

Examples

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