rusty-back
noun
(Also rusty-back fern) any of several ferns with rust-coloured sori or scales on the fronds; (in later use) specifically Asplenium ceterach (family Aspleniaceae), a European fern which has alternately lobed, lanceolate leaves densely covered beneath with scales which become reddish-brown with maturity.
Origin
Late 18th century; earliest use found in William Withering (1741–1799), physician and botanist.
- electric kite
- electric light
- electric light bulb
- electric-lighted
- electric lighting
- electric line
- electric-lit
- electric lobe
- electric locomotive
- electric log
- electric machine
- electric mixer
- electric moment
- electric motor
- electric nerve
- electric organ
- electric piano
- electric potential
- electric power
- electric-powered
- electric puha
- electric quadrupole
- electric range
- electric ray
- electric razor