any of several ferns of the genus Woodwardia, having a chainlike row of sori on either side of the midrib of each fertile leaflet.
a group of convicts chained together, especially when working outside. noun (US) a group of convicted prisoners chained together, usually while doing hard labour noun phrase The football officials who carry and set the chain that marks off the ten yards needed for a first down (1980s+)
a gear assembly in which motion is transmitted by means of a chain.
- Chain grate
noun a type of mechanical stoker for a furnace, in which the grate consists of an endless chain that draws the solid fuel into the furnace as it rotates
a codon that starts the synthesis of a protein molecule.