ferning fern·ing (fûr’nĭng)
The formation of a fernlike pattern in a specimen of crystallized cervical mucus secreted at midcycle.
- Fern root
noun 1. another name for aruhe
[furn] /fɜrn/ noun 1. any seedless, nonflowering vascular plant of the class Filicinae, of tropical to temperate regions, characterized by true roots produced from a rhizome, triangular fronds that uncoil upward and have a branching vein system, and reproduction by spores contained in sporangia that appear as brown dots on the underside of the fronds. […]
noun 1. the spores of ferns, formerly supposed to have the power to make persons invisible. noun 1. the minute particles by which ferns reproduce themselves, formerly thought to be invisible. Possession of them was thought to make a person invisible
- Fern test
fern test n. A test for estrogenic activity in which cervical mucus smears form a fernlike pattern at times when estrogen secretion is elevated, as at the time of ovulation.