a common, widely distributed fern, Onoclea sensibilis, having large, triangular leaves and beadlike spikes that contain the spores.
Words nearby sensitive fern
Origin of sensitive fern
An Americanism dating back to 1805–15; so called from the sensitivity of its foliage to frost
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020