Definitions

from The American Heritage® Dictionary of the English Language, 5th Edition.

  • noun An individual animal produced from an egg.
  • noun A zooid.

Etymologies

from The American Heritage® Dictionary of the English Language, 4th Edition

[New Latin zōon, from Greek zōion, zōon, living being; see gwei- in Indo-European roots.]

from Wiktionary, Creative Commons Attribution/Share-Alike License

First adopted by Herbert Spencer in Principles of Biology (see 1864 quotation): from New Latin zōon, from Ancient Greek ζῷον (zōion, "animal").

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