Definition of maidenhair spleenwort in English:

maidenhair spleenwort

noun

  • (More fully "common maidenhair spleenwort") a common spleenwort of rocks and walls, Asplenium trichomanes, which has simply pinnate fronds and a black rachis; (also, with distinguishing word) any of several related spleenworts.

Origin

Mid 19th century; earliest use found in William Macgillivray (1796–1852), ornithologist and natural historian.