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ferning

The English word “ferning” has 1 meaning listed here.

noun

  1. A characteristic fern-like pattern on a slide viewed under low power on a microscope, used as a sign when testing for ovulation or the presence of amniotic fluid.

Etymology

From fern + -ing.

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Definitions are from Wiktionary, extracted by Kaikki.org, and are available under the CC BY-SA 4.0 licence.