I. verb — [with obj.] 1. heat (metal or glass) and allow it to cool slowly, in order to remove internal stresses and toughen it. • copper tubes must be annealed after bending or they will be brittle.
• (as adj. annealing)
the chimneys of annealing furnaces.
‹figurative› Dr Lowenstein, annealed to hostility, looked at me coolly.
[Biochemistry] recombine (DNA) in the double-stranded form.
II. derivatives annealer noun
– origin Old English onǣlan, from on + ǣlan ‘burn, bake’ from āl ‘fire, burning’. The original sense was ‘set on fire’, hence (in late Middle English) ‘subject to fire, alter by heating’.