To subject to great heat and then (often slow) cooling, and sometimes reheating and further cooling, for the purpose of rendering less brittle; to temper; to toughen.
To cool glass slowly, to minimize internal stress.
To make a double-stranded nucleic acid by pairing a single strand with a complementary strand.
An act of annealing.
To adapt for comfort in extreme climates, especially as regards to temperature.
To acclimate or become acclimated.