Etymograph

English

rustyback

From rusty + back.

A compound of rusty + back

Proto-Germanic *rustagaz

Old English rūstiġ

Middle English rusty ‘rusty, rusted’

English rusty

Proto-Germanic *baką ‘back’

Proto-West Germanic *bak

Old English bæc

Middle English bak ‘the back’

English back

Today it means

noun Asplenium ceterach (syn. Ceterach officinarum), a fern with orange-brown trichomes.

Sources

Sources: Wiktionary, “rustyback”. By Wiktionary contributors, CC BY-SA 4.0, via kaikki.org (dump of Oct 3 2026); text adapted and restructured. Language periods are conventional ranges, not dates for this word. License.

Etymograph / rustyback