Blănch'ing, n.

n. 1. The act of whitening; the operation of giving a peculiar luster and brightness to pieces of silver about to be coined, and not yet stamped, by means of acids, heat, &c.

2. The covering of iron plates with a thin coat of tin.
3. (Gardening.) The process of whitening the stalks or leaves of plants, by earthing them up, or tying them together, so as to exclude the light or diminish its intensity; etiolation.