Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License.

  • adjective geology Of or pertaining to a geological epoch, the oldest age or lowest stratigraphic stage of the Eocene.

Etymologies

from Wiktionary, Creative Commons Attribution/Share-Alike License

From the French ypresien, from Ypres + -ien; equivalent to Ypres + -ian; compare yperite.

Examples

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