noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A small European fern (Asplenium ceterach) formerly used in medicine. archaic, uncountable

Synonyms

All synonyms

rustybackrustyback fern

Etymology

From milt + waste.

Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.