What does "ypresian" mean?

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

How do you pronounce "ypresian"?

Pronounced //iːˈpɹɛz.i.ən//.

/iːˈpɹɛz.i.ən/ adj, name

adj, name ·Rare ·Advanced level

Adjective

1
Of or pertaining to a geological epoch, the oldest age or lowest stratigraphic stage of the Eocene. not-comparable

Proper Noun

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