Bolting

bolting [′bōl·tiŋ]

(engineering)

A fastening system using screw-threaded devices such as nuts, bolts, or studs.

(food engineering)

The process of refining or purifying, especially of sifting flour or meal through a sieve.

(mining engineering)

The use of vibrating sieves to separate particles of different sizes.

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Bolting 

in plants, the development of any organ of a plant from another organ that has already completed its growth. For example, a leafy shoot, a flower, or even a raceme may form from a flower; a large number of secondary and tertiary shoots may appear on a primary shoot; and secondary tubers may appear on potato tubers instead of buds. The causes of bolting may be parasitic mycoplasmic organisms that produce yellows, big bud, and pupation in plants; aphids; and ecological factors, such as severe drought.